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bgpd: Add some debugs to note when we are not talking to zebra
[mirror_frr.git] / bgpd / bgpd.c
1 /* BGP-4, BGP-4+ daemon program
2 * Copyright (C) 1996, 97, 98, 99, 2000 Kunihiro Ishiguro
3 *
4 * This file is part of GNU Zebra.
5 *
6 * GNU Zebra is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2, or (at your option) any
9 * later version.
10 *
11 * GNU Zebra is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; see the file COPYING; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <zebra.h>
22
23 #include "prefix.h"
24 #include "thread.h"
25 #include "buffer.h"
26 #include "stream.h"
27 #include "ringbuf.h"
28 #include "command.h"
29 #include "sockunion.h"
30 #include "sockopt.h"
31 #include "network.h"
32 #include "memory.h"
33 #include "filter.h"
34 #include "routemap.h"
35 #include "log.h"
36 #include "plist.h"
37 #include "linklist.h"
38 #include "workqueue.h"
39 #include "queue.h"
40 #include "zclient.h"
41 #include "bfd.h"
42 #include "hash.h"
43 #include "jhash.h"
44 #include "table.h"
45 #include "lib/json.h"
46 #include "frr_pthread.h"
47 #include "bitfield.h"
48
49 #include "bgpd/bgpd.h"
50 #include "bgpd/bgp_table.h"
51 #include "bgpd/bgp_aspath.h"
52 #include "bgpd/bgp_route.h"
53 #include "bgpd/bgp_dump.h"
54 #include "bgpd/bgp_debug.h"
55 #include "bgpd/bgp_errors.h"
56 #include "bgpd/bgp_community.h"
57 #include "bgpd/bgp_attr.h"
58 #include "bgpd/bgp_regex.h"
59 #include "bgpd/bgp_clist.h"
60 #include "bgpd/bgp_fsm.h"
61 #include "bgpd/bgp_packet.h"
62 #include "bgpd/bgp_zebra.h"
63 #include "bgpd/bgp_open.h"
64 #include "bgpd/bgp_filter.h"
65 #include "bgpd/bgp_nexthop.h"
66 #include "bgpd/bgp_damp.h"
67 #include "bgpd/bgp_mplsvpn.h"
68 #if ENABLE_BGP_VNC
69 #include "bgpd/rfapi/bgp_rfapi_cfg.h"
70 #include "bgpd/rfapi/rfapi_backend.h"
71 #endif
72 #include "bgpd/bgp_evpn.h"
73 #include "bgpd/bgp_advertise.h"
74 #include "bgpd/bgp_network.h"
75 #include "bgpd/bgp_vty.h"
76 #include "bgpd/bgp_mpath.h"
77 #include "bgpd/bgp_nht.h"
78 #include "bgpd/bgp_updgrp.h"
79 #include "bgpd/bgp_bfd.h"
80 #include "bgpd/bgp_memory.h"
81 #include "bgpd/bgp_evpn_vty.h"
82 #include "bgpd/bgp_keepalives.h"
83 #include "bgpd/bgp_io.h"
84 #include "bgpd/bgp_ecommunity.h"
85 #include "bgpd/bgp_flowspec.h"
86 #include "bgpd/bgp_labelpool.h"
87 #include "bgpd/bgp_pbr.h"
88
89 DEFINE_MTYPE_STATIC(BGPD, PEER_TX_SHUTDOWN_MSG, "Peer shutdown message (TX)");
90 DEFINE_QOBJ_TYPE(bgp_master)
91 DEFINE_QOBJ_TYPE(bgp)
92 DEFINE_QOBJ_TYPE(peer)
93
94 /* BGP process wide configuration. */
95 static struct bgp_master bgp_master;
96
97 /* BGP process wide configuration pointer to export. */
98 struct bgp_master *bm;
99
100 /* BGP community-list. */
101 struct community_list_handler *bgp_clist;
102
103 unsigned int multipath_num = MULTIPATH_NUM;
104
105 static void bgp_if_finish(struct bgp *bgp);
106 static void peer_drop_dynamic_neighbor(struct peer *peer);
107
108 extern struct zclient *zclient;
109
110 /* handle main socket creation or deletion */
111 static int bgp_check_main_socket(bool create, struct bgp *bgp)
112 {
113 static int bgp_server_main_created;
114
115 if (create == true) {
116 if (bgp_server_main_created)
117 return 0;
118 if (bgp_socket(bgp, bm->port, bm->address) < 0)
119 return BGP_ERR_INVALID_VALUE;
120 bgp_server_main_created = 1;
121 return 0;
122 }
123 if (!bgp_server_main_created)
124 return 0;
125 bgp_close();
126 bgp_server_main_created = 0;
127 return 0;
128 }
129
130 void bgp_session_reset(struct peer *peer)
131 {
132 if (peer->doppelganger && (peer->doppelganger->status != Deleted)
133 && !(CHECK_FLAG(peer->doppelganger->flags, PEER_FLAG_CONFIG_NODE)))
134 peer_delete(peer->doppelganger);
135
136 BGP_EVENT_ADD(peer, BGP_Stop);
137 }
138
139 /*
140 * During session reset, we may delete the doppelganger peer, which would
141 * be the next node to the current node. If the session reset was invoked
142 * during walk of peer list, we would end up accessing the freed next
143 * node. This function moves the next node along.
144 */
145 static void bgp_session_reset_safe(struct peer *peer, struct listnode **nnode)
146 {
147 struct listnode *n;
148 struct peer *npeer;
149
150 n = (nnode) ? *nnode : NULL;
151 npeer = (n) ? listgetdata(n) : NULL;
152
153 if (peer->doppelganger && (peer->doppelganger->status != Deleted)
154 && !(CHECK_FLAG(peer->doppelganger->flags,
155 PEER_FLAG_CONFIG_NODE))) {
156 if (peer->doppelganger == npeer)
157 /* nnode and *nnode are confirmed to be non-NULL here */
158 *nnode = (*nnode)->next;
159 peer_delete(peer->doppelganger);
160 }
161
162 BGP_EVENT_ADD(peer, BGP_Stop);
163 }
164
165 /* BGP global flag manipulation. */
166 int bgp_option_set(int flag)
167 {
168 switch (flag) {
169 case BGP_OPT_NO_FIB:
170 case BGP_OPT_MULTIPLE_INSTANCE:
171 case BGP_OPT_CONFIG_CISCO:
172 case BGP_OPT_NO_LISTEN:
173 SET_FLAG(bm->options, flag);
174 break;
175 default:
176 return BGP_ERR_INVALID_FLAG;
177 }
178 return 0;
179 }
180
181 int bgp_option_unset(int flag)
182 {
183 switch (flag) {
184 case BGP_OPT_MULTIPLE_INSTANCE:
185 if (listcount(bm->bgp) > 1)
186 return BGP_ERR_MULTIPLE_INSTANCE_USED;
187 /* Fall through. */
188 case BGP_OPT_NO_FIB:
189 case BGP_OPT_CONFIG_CISCO:
190 UNSET_FLAG(bm->options, flag);
191 break;
192 default:
193 return BGP_ERR_INVALID_FLAG;
194 }
195 return 0;
196 }
197
198 int bgp_option_check(int flag)
199 {
200 return CHECK_FLAG(bm->options, flag);
201 }
202
203 /* BGP flag manipulation. */
204 int bgp_flag_set(struct bgp *bgp, int flag)
205 {
206 SET_FLAG(bgp->flags, flag);
207 return 0;
208 }
209
210 int bgp_flag_unset(struct bgp *bgp, int flag)
211 {
212 UNSET_FLAG(bgp->flags, flag);
213 return 0;
214 }
215
216 int bgp_flag_check(struct bgp *bgp, int flag)
217 {
218 return CHECK_FLAG(bgp->flags, flag);
219 }
220
221 /* Internal function to set BGP structure configureation flag. */
222 static void bgp_config_set(struct bgp *bgp, int config)
223 {
224 SET_FLAG(bgp->config, config);
225 }
226
227 static void bgp_config_unset(struct bgp *bgp, int config)
228 {
229 UNSET_FLAG(bgp->config, config);
230 }
231
232 static int bgp_config_check(struct bgp *bgp, int config)
233 {
234 return CHECK_FLAG(bgp->config, config);
235 }
236
237 /* Set BGP router identifier. */
238 static int bgp_router_id_set(struct bgp *bgp, const struct in_addr *id)
239 {
240 struct peer *peer;
241 struct listnode *node, *nnode;
242
243 if (IPV4_ADDR_SAME(&bgp->router_id, id))
244 return 0;
245
246 /* EVPN uses router id in RD, withdraw them */
247 if (is_evpn_enabled())
248 bgp_evpn_handle_router_id_update(bgp, TRUE);
249
250 IPV4_ADDR_COPY(&bgp->router_id, id);
251
252 /* Set all peer's local identifier with this value. */
253 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
254 IPV4_ADDR_COPY(&peer->local_id, id);
255
256 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
257 peer->last_reset = PEER_DOWN_RID_CHANGE;
258 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
259 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
260 }
261 }
262
263 /* EVPN uses router id in RD, update them */
264 if (is_evpn_enabled())
265 bgp_evpn_handle_router_id_update(bgp, FALSE);
266
267 return 0;
268 }
269
270 void bgp_router_id_zebra_bump(vrf_id_t vrf_id, const struct prefix *router_id)
271 {
272 struct listnode *node, *nnode;
273 struct bgp *bgp;
274
275 if (vrf_id == VRF_DEFAULT) {
276 /* Router-id change for default VRF has to also update all
277 * views. */
278 for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp)) {
279 if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
280 continue;
281
282 bgp->router_id_zebra = router_id->u.prefix4;
283 if (!bgp->router_id_static.s_addr)
284 bgp_router_id_set(bgp, &router_id->u.prefix4);
285 }
286 } else {
287 bgp = bgp_lookup_by_vrf_id(vrf_id);
288 if (bgp) {
289 bgp->router_id_zebra = router_id->u.prefix4;
290
291 if (!bgp->router_id_static.s_addr)
292 bgp_router_id_set(bgp, &router_id->u.prefix4);
293 }
294 }
295 }
296
297 int bgp_router_id_static_set(struct bgp *bgp, struct in_addr id)
298 {
299 bgp->router_id_static = id;
300 bgp_router_id_set(bgp, id.s_addr ? &id : &bgp->router_id_zebra);
301 return 0;
302 }
303
304 /* BGP's cluster-id control. */
305 int bgp_cluster_id_set(struct bgp *bgp, struct in_addr *cluster_id)
306 {
307 struct peer *peer;
308 struct listnode *node, *nnode;
309
310 if (bgp_config_check(bgp, BGP_CONFIG_CLUSTER_ID)
311 && IPV4_ADDR_SAME(&bgp->cluster_id, cluster_id))
312 return 0;
313
314 IPV4_ADDR_COPY(&bgp->cluster_id, cluster_id);
315 bgp_config_set(bgp, BGP_CONFIG_CLUSTER_ID);
316
317 /* Clear all IBGP peer. */
318 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
319 if (peer->sort != BGP_PEER_IBGP)
320 continue;
321
322 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
323 peer->last_reset = PEER_DOWN_CLID_CHANGE;
324 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
325 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
326 }
327 }
328 return 0;
329 }
330
331 int bgp_cluster_id_unset(struct bgp *bgp)
332 {
333 struct peer *peer;
334 struct listnode *node, *nnode;
335
336 if (!bgp_config_check(bgp, BGP_CONFIG_CLUSTER_ID))
337 return 0;
338
339 bgp->cluster_id.s_addr = 0;
340 bgp_config_unset(bgp, BGP_CONFIG_CLUSTER_ID);
341
342 /* Clear all IBGP peer. */
343 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
344 if (peer->sort != BGP_PEER_IBGP)
345 continue;
346
347 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
348 peer->last_reset = PEER_DOWN_CLID_CHANGE;
349 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
350 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
351 }
352 }
353 return 0;
354 }
355
356 /* time_t value that is monotonicly increasing
357 * and uneffected by adjustments to system clock
358 */
359 time_t bgp_clock(void)
360 {
361 struct timeval tv;
362
363 monotime(&tv);
364 return tv.tv_sec;
365 }
366
367 /* BGP timer configuration. */
368 int bgp_timers_set(struct bgp *bgp, uint32_t keepalive, uint32_t holdtime)
369 {
370 bgp->default_keepalive =
371 (keepalive < holdtime / 3 ? keepalive : holdtime / 3);
372 bgp->default_holdtime = holdtime;
373
374 return 0;
375 }
376
377 int bgp_timers_unset(struct bgp *bgp)
378 {
379 bgp->default_keepalive = BGP_DEFAULT_KEEPALIVE;
380 bgp->default_holdtime = BGP_DEFAULT_HOLDTIME;
381
382 return 0;
383 }
384
385 /* BGP confederation configuration. */
386 int bgp_confederation_id_set(struct bgp *bgp, as_t as)
387 {
388 struct peer *peer;
389 struct listnode *node, *nnode;
390 int already_confed;
391
392 if (as == 0)
393 return BGP_ERR_INVALID_AS;
394
395 /* Remember - were we doing confederation before? */
396 already_confed = bgp_config_check(bgp, BGP_CONFIG_CONFEDERATION);
397 bgp->confed_id = as;
398 bgp_config_set(bgp, BGP_CONFIG_CONFEDERATION);
399
400 /* If we were doing confederation already, this is just an external
401 AS change. Just Reset EBGP sessions, not CONFED sessions. If we
402 were not doing confederation before, reset all EBGP sessions. */
403 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
404 /* We're looking for peers who's AS is not local or part of our
405 confederation. */
406 if (already_confed) {
407 if (peer_sort(peer) == BGP_PEER_EBGP) {
408 peer->local_as = as;
409 if (BGP_IS_VALID_STATE_FOR_NOTIF(
410 peer->status)) {
411 peer->last_reset =
412 PEER_DOWN_CONFED_ID_CHANGE;
413 bgp_notify_send(
414 peer, BGP_NOTIFY_CEASE,
415 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
416 } else
417 bgp_session_reset_safe(peer, &nnode);
418 }
419 } else {
420 /* Not doign confederation before, so reset every
421 non-local
422 session */
423 if (peer_sort(peer) != BGP_PEER_IBGP) {
424 /* Reset the local_as to be our EBGP one */
425 if (peer_sort(peer) == BGP_PEER_EBGP)
426 peer->local_as = as;
427 if (BGP_IS_VALID_STATE_FOR_NOTIF(
428 peer->status)) {
429 peer->last_reset =
430 PEER_DOWN_CONFED_ID_CHANGE;
431 bgp_notify_send(
432 peer, BGP_NOTIFY_CEASE,
433 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
434 } else
435 bgp_session_reset_safe(peer, &nnode);
436 }
437 }
438 }
439 return 0;
440 }
441
442 int bgp_confederation_id_unset(struct bgp *bgp)
443 {
444 struct peer *peer;
445 struct listnode *node, *nnode;
446
447 bgp->confed_id = 0;
448 bgp_config_unset(bgp, BGP_CONFIG_CONFEDERATION);
449
450 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
451 /* We're looking for peers who's AS is not local */
452 if (peer_sort(peer) != BGP_PEER_IBGP) {
453 peer->local_as = bgp->as;
454 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
455 peer->last_reset = PEER_DOWN_CONFED_ID_CHANGE;
456 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
457 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
458 }
459
460 else
461 bgp_session_reset_safe(peer, &nnode);
462 }
463 }
464 return 0;
465 }
466
467 /* Is an AS part of the confed or not? */
468 int bgp_confederation_peers_check(struct bgp *bgp, as_t as)
469 {
470 int i;
471
472 if (!bgp)
473 return 0;
474
475 for (i = 0; i < bgp->confed_peers_cnt; i++)
476 if (bgp->confed_peers[i] == as)
477 return 1;
478
479 return 0;
480 }
481
482 /* Add an AS to the confederation set. */
483 int bgp_confederation_peers_add(struct bgp *bgp, as_t as)
484 {
485 struct peer *peer;
486 struct listnode *node, *nnode;
487
488 if (!bgp)
489 return BGP_ERR_INVALID_BGP;
490
491 if (bgp->as == as)
492 return BGP_ERR_INVALID_AS;
493
494 if (bgp_confederation_peers_check(bgp, as))
495 return -1;
496
497 if (bgp->confed_peers)
498 bgp->confed_peers =
499 XREALLOC(MTYPE_BGP_CONFED_LIST, bgp->confed_peers,
500 (bgp->confed_peers_cnt + 1) * sizeof(as_t));
501 else
502 bgp->confed_peers =
503 XMALLOC(MTYPE_BGP_CONFED_LIST,
504 (bgp->confed_peers_cnt + 1) * sizeof(as_t));
505
506 bgp->confed_peers[bgp->confed_peers_cnt] = as;
507 bgp->confed_peers_cnt++;
508
509 if (bgp_config_check(bgp, BGP_CONFIG_CONFEDERATION)) {
510 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
511 if (peer->as == as) {
512 peer->local_as = bgp->as;
513 if (BGP_IS_VALID_STATE_FOR_NOTIF(
514 peer->status)) {
515 peer->last_reset =
516 PEER_DOWN_CONFED_PEER_CHANGE;
517 bgp_notify_send(
518 peer, BGP_NOTIFY_CEASE,
519 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
520 } else
521 bgp_session_reset_safe(peer, &nnode);
522 }
523 }
524 }
525 return 0;
526 }
527
528 /* Delete an AS from the confederation set. */
529 int bgp_confederation_peers_remove(struct bgp *bgp, as_t as)
530 {
531 int i;
532 int j;
533 struct peer *peer;
534 struct listnode *node, *nnode;
535
536 if (!bgp)
537 return -1;
538
539 if (!bgp_confederation_peers_check(bgp, as))
540 return -1;
541
542 for (i = 0; i < bgp->confed_peers_cnt; i++)
543 if (bgp->confed_peers[i] == as)
544 for (j = i + 1; j < bgp->confed_peers_cnt; j++)
545 bgp->confed_peers[j - 1] = bgp->confed_peers[j];
546
547 bgp->confed_peers_cnt--;
548
549 if (bgp->confed_peers_cnt == 0) {
550 if (bgp->confed_peers)
551 XFREE(MTYPE_BGP_CONFED_LIST, bgp->confed_peers);
552 bgp->confed_peers = NULL;
553 } else
554 bgp->confed_peers =
555 XREALLOC(MTYPE_BGP_CONFED_LIST, bgp->confed_peers,
556 bgp->confed_peers_cnt * sizeof(as_t));
557
558 /* Now reset any peer who's remote AS has just been removed from the
559 CONFED */
560 if (bgp_config_check(bgp, BGP_CONFIG_CONFEDERATION)) {
561 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
562 if (peer->as == as) {
563 peer->local_as = bgp->confed_id;
564 if (BGP_IS_VALID_STATE_FOR_NOTIF(
565 peer->status)) {
566 peer->last_reset =
567 PEER_DOWN_CONFED_PEER_CHANGE;
568 bgp_notify_send(
569 peer, BGP_NOTIFY_CEASE,
570 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
571 } else
572 bgp_session_reset_safe(peer, &nnode);
573 }
574 }
575 }
576
577 return 0;
578 }
579
580 /* Local preference configuration. */
581 int bgp_default_local_preference_set(struct bgp *bgp, uint32_t local_pref)
582 {
583 if (!bgp)
584 return -1;
585
586 bgp->default_local_pref = local_pref;
587
588 return 0;
589 }
590
591 int bgp_default_local_preference_unset(struct bgp *bgp)
592 {
593 if (!bgp)
594 return -1;
595
596 bgp->default_local_pref = BGP_DEFAULT_LOCAL_PREF;
597
598 return 0;
599 }
600
601 /* Local preference configuration. */
602 int bgp_default_subgroup_pkt_queue_max_set(struct bgp *bgp, uint32_t queue_size)
603 {
604 if (!bgp)
605 return -1;
606
607 bgp->default_subgroup_pkt_queue_max = queue_size;
608
609 return 0;
610 }
611
612 int bgp_default_subgroup_pkt_queue_max_unset(struct bgp *bgp)
613 {
614 if (!bgp)
615 return -1;
616 bgp->default_subgroup_pkt_queue_max =
617 BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX;
618
619 return 0;
620 }
621
622 /* Listen limit configuration. */
623 int bgp_listen_limit_set(struct bgp *bgp, int listen_limit)
624 {
625 if (!bgp)
626 return -1;
627
628 bgp->dynamic_neighbors_limit = listen_limit;
629
630 return 0;
631 }
632
633 int bgp_listen_limit_unset(struct bgp *bgp)
634 {
635 if (!bgp)
636 return -1;
637
638 bgp->dynamic_neighbors_limit = BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT;
639
640 return 0;
641 }
642
643 int bgp_map_afi_safi_iana2int(iana_afi_t pkt_afi, iana_safi_t pkt_safi,
644 afi_t *afi, safi_t *safi)
645 {
646 /* Map from IANA values to internal values, return error if
647 * values are unrecognized.
648 */
649 *afi = afi_iana2int(pkt_afi);
650 *safi = safi_iana2int(pkt_safi);
651 if (*afi == AFI_MAX || *safi == SAFI_MAX)
652 return -1;
653
654 return 0;
655 }
656
657 int bgp_map_afi_safi_int2iana(afi_t afi, safi_t safi, iana_afi_t *pkt_afi,
658 iana_safi_t *pkt_safi)
659 {
660 /* Map from internal values to IANA values, return error if
661 * internal values are bad (unexpected).
662 */
663 if (afi == AFI_MAX || safi == SAFI_MAX)
664 return -1;
665 *pkt_afi = afi_int2iana(afi);
666 *pkt_safi = safi_int2iana(safi);
667 return 0;
668 }
669
670 struct peer_af *peer_af_create(struct peer *peer, afi_t afi, safi_t safi)
671 {
672 struct peer_af *af;
673 int afid;
674
675 if (!peer)
676 return NULL;
677
678 afid = afindex(afi, safi);
679 if (afid >= BGP_AF_MAX)
680 return NULL;
681
682 assert(peer->peer_af_array[afid] == NULL);
683
684 /* Allocate new peer af */
685 af = XCALLOC(MTYPE_BGP_PEER_AF, sizeof(struct peer_af));
686
687 peer->peer_af_array[afid] = af;
688 af->afi = afi;
689 af->safi = safi;
690 af->afid = afid;
691 af->peer = peer;
692
693 return af;
694 }
695
696 struct peer_af *peer_af_find(struct peer *peer, afi_t afi, safi_t safi)
697 {
698 int afid;
699
700 if (!peer)
701 return NULL;
702
703 afid = afindex(afi, safi);
704 if (afid >= BGP_AF_MAX)
705 return NULL;
706
707 return peer->peer_af_array[afid];
708 }
709
710 int peer_af_delete(struct peer *peer, afi_t afi, safi_t safi)
711 {
712 struct peer_af *af;
713 int afid;
714
715 if (!peer)
716 return -1;
717
718 afid = afindex(afi, safi);
719 if (afid >= BGP_AF_MAX)
720 return -1;
721
722 af = peer->peer_af_array[afid];
723 if (!af)
724 return -1;
725
726 bgp_stop_announce_route_timer(af);
727
728 if (PAF_SUBGRP(af)) {
729 if (BGP_DEBUG(update_groups, UPDATE_GROUPS))
730 zlog_debug("u%" PRIu64 ":s%" PRIu64 " remove peer %s",
731 af->subgroup->update_group->id,
732 af->subgroup->id, peer->host);
733 }
734
735 update_subgroup_remove_peer(af->subgroup, af);
736
737 peer->peer_af_array[afid] = NULL;
738 XFREE(MTYPE_BGP_PEER_AF, af);
739 return 0;
740 }
741
742 /* Peer comparison function for sorting. */
743 int peer_cmp(struct peer *p1, struct peer *p2)
744 {
745 if (p1->group && !p2->group)
746 return -1;
747
748 if (!p1->group && p2->group)
749 return 1;
750
751 if (p1->group == p2->group) {
752 if (p1->conf_if && !p2->conf_if)
753 return -1;
754
755 if (!p1->conf_if && p2->conf_if)
756 return 1;
757
758 if (p1->conf_if && p2->conf_if)
759 return if_cmp_name_func(p1->conf_if, p2->conf_if);
760 } else
761 return strcmp(p1->group->name, p2->group->name);
762
763 return sockunion_cmp(&p1->su, &p2->su);
764 }
765
766 static unsigned int peer_hash_key_make(void *p)
767 {
768 struct peer *peer = p;
769 return sockunion_hash(&peer->su);
770 }
771
772 static bool peer_hash_same(const void *p1, const void *p2)
773 {
774 const struct peer *peer1 = p1;
775 const struct peer *peer2 = p2;
776 return (sockunion_same(&peer1->su, &peer2->su)
777 && CHECK_FLAG(peer1->flags, PEER_FLAG_CONFIG_NODE)
778 == CHECK_FLAG(peer2->flags, PEER_FLAG_CONFIG_NODE));
779 }
780
781 void peer_flag_inherit(struct peer *peer, uint32_t flag)
782 {
783 bool group_val;
784
785 /* Skip if peer is not a peer-group member. */
786 if (!peer_group_active(peer))
787 return;
788
789 /* Unset override flag to signal inheritance from peer-group. */
790 UNSET_FLAG(peer->flags_override, flag);
791
792 /*
793 * Inherit flag state from peer-group. If the flag of the peer-group is
794 * not being inverted, the peer must inherit the inverse of the current
795 * peer-group flag state.
796 */
797 group_val = CHECK_FLAG(peer->group->conf->flags, flag);
798 if (!CHECK_FLAG(peer->group->conf->flags_invert, flag)
799 && CHECK_FLAG(peer->flags_invert, flag))
800 COND_FLAG(peer->flags, flag, !group_val);
801 else
802 COND_FLAG(peer->flags, flag, group_val);
803 }
804
805 int peer_af_flag_check(struct peer *peer, afi_t afi, safi_t safi, uint32_t flag)
806 {
807 return CHECK_FLAG(peer->af_flags[afi][safi], flag);
808 }
809
810 void peer_af_flag_inherit(struct peer *peer, afi_t afi, safi_t safi,
811 uint32_t flag)
812 {
813 bool group_val;
814
815 /* Skip if peer is not a peer-group member. */
816 if (!peer_group_active(peer))
817 return;
818
819 /* Unset override flag to signal inheritance from peer-group. */
820 UNSET_FLAG(peer->af_flags_override[afi][safi], flag);
821
822 /*
823 * Inherit flag state from peer-group. If the flag of the peer-group is
824 * not being inverted, the peer must inherit the inverse of the current
825 * peer-group flag state.
826 */
827 group_val = CHECK_FLAG(peer->group->conf->af_flags[afi][safi], flag);
828 if (!CHECK_FLAG(peer->group->conf->af_flags_invert[afi][safi], flag)
829 && CHECK_FLAG(peer->af_flags_invert[afi][safi], flag))
830 COND_FLAG(peer->af_flags[afi][safi], flag, !group_val);
831 else
832 COND_FLAG(peer->af_flags[afi][safi], flag, group_val);
833 }
834
835 static bool peergroup_flag_check(struct peer *peer, uint32_t flag)
836 {
837 if (!peer_group_active(peer)) {
838 if (CHECK_FLAG(peer->flags_invert, flag))
839 return !CHECK_FLAG(peer->flags, flag);
840 else
841 return !!CHECK_FLAG(peer->flags, flag);
842 }
843
844 return !!CHECK_FLAG(peer->flags_override, flag);
845 }
846
847 static bool peergroup_af_flag_check(struct peer *peer, afi_t afi, safi_t safi,
848 uint32_t flag)
849 {
850 if (!peer_group_active(peer)) {
851 if (CHECK_FLAG(peer->af_flags_invert[afi][safi], flag))
852 return !peer_af_flag_check(peer, afi, safi, flag);
853 else
854 return !!peer_af_flag_check(peer, afi, safi, flag);
855 }
856
857 return !!CHECK_FLAG(peer->af_flags_override[afi][safi], flag);
858 }
859
860 static bool peergroup_filter_check(struct peer *peer, afi_t afi, safi_t safi,
861 uint8_t type, int direct)
862 {
863 struct bgp_filter *filter;
864
865 if (peer_group_active(peer))
866 return !!CHECK_FLAG(peer->filter_override[afi][safi][direct],
867 type);
868
869 filter = &peer->filter[afi][safi];
870 switch (type) {
871 case PEER_FT_DISTRIBUTE_LIST:
872 return !!(filter->dlist[direct].name);
873 case PEER_FT_FILTER_LIST:
874 return !!(filter->aslist[direct].name);
875 case PEER_FT_PREFIX_LIST:
876 return !!(filter->plist[direct].name);
877 case PEER_FT_ROUTE_MAP:
878 return !!(filter->map[direct].name);
879 case PEER_FT_UNSUPPRESS_MAP:
880 return !!(filter->usmap.name);
881 default:
882 return false;
883 }
884 }
885
886 /* Check peer's AS number and determines if this peer is IBGP or EBGP */
887 static inline bgp_peer_sort_t peer_calc_sort(struct peer *peer)
888 {
889 struct bgp *bgp;
890
891 bgp = peer->bgp;
892
893 /* Peer-group */
894 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
895 if (peer->as_type == AS_INTERNAL)
896 return BGP_PEER_IBGP;
897
898 else if (peer->as_type == AS_EXTERNAL)
899 return BGP_PEER_EBGP;
900
901 else if (peer->as_type == AS_SPECIFIED && peer->as) {
902 assert(bgp);
903 return (bgp->as == peer->as ? BGP_PEER_IBGP
904 : BGP_PEER_EBGP);
905 }
906
907 else {
908 struct peer *peer1;
909
910 assert(peer->group);
911 peer1 = listnode_head(peer->group->peer);
912
913 if (peer1)
914 return peer1->sort;
915 }
916 return BGP_PEER_INTERNAL;
917 }
918
919 /* Normal peer */
920 if (bgp && CHECK_FLAG(bgp->config, BGP_CONFIG_CONFEDERATION)) {
921 if (peer->local_as == 0)
922 return BGP_PEER_INTERNAL;
923
924 if (peer->local_as == peer->as) {
925 if (bgp->as == bgp->confed_id) {
926 if (peer->local_as == bgp->as)
927 return BGP_PEER_IBGP;
928 else
929 return BGP_PEER_EBGP;
930 } else {
931 if (peer->local_as == bgp->confed_id)
932 return BGP_PEER_EBGP;
933 else
934 return BGP_PEER_IBGP;
935 }
936 }
937
938 if (bgp_confederation_peers_check(bgp, peer->as))
939 return BGP_PEER_CONFED;
940
941 return BGP_PEER_EBGP;
942 } else {
943 if (peer->as_type != AS_SPECIFIED)
944 return (peer->as_type == AS_INTERNAL ? BGP_PEER_IBGP
945 : BGP_PEER_EBGP);
946
947 return (peer->local_as == 0
948 ? BGP_PEER_INTERNAL
949 : peer->local_as == peer->as ? BGP_PEER_IBGP
950 : BGP_PEER_EBGP);
951 }
952 }
953
954 /* Calculate and cache the peer "sort" */
955 bgp_peer_sort_t peer_sort(struct peer *peer)
956 {
957 peer->sort = peer_calc_sort(peer);
958 return peer->sort;
959 }
960
961 static void peer_free(struct peer *peer)
962 {
963 assert(peer->status == Deleted);
964
965 QOBJ_UNREG(peer);
966
967 /* this /ought/ to have been done already through bgp_stop earlier,
968 * but just to be sure..
969 */
970 bgp_timer_set(peer);
971 bgp_reads_off(peer);
972 bgp_writes_off(peer);
973 assert(!peer->t_write);
974 assert(!peer->t_read);
975 BGP_EVENT_FLUSH(peer);
976
977 pthread_mutex_destroy(&peer->io_mtx);
978
979 /* Free connected nexthop, if present */
980 if (CHECK_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE)
981 && !peer_dynamic_neighbor(peer))
982 bgp_delete_connected_nexthop(family2afi(peer->su.sa.sa_family),
983 peer);
984
985 XFREE(MTYPE_PEER_TX_SHUTDOWN_MSG, peer->tx_shutdown_message);
986
987 if (peer->desc) {
988 XFREE(MTYPE_PEER_DESC, peer->desc);
989 peer->desc = NULL;
990 }
991
992 /* Free allocated host character. */
993 if (peer->host) {
994 XFREE(MTYPE_BGP_PEER_HOST, peer->host);
995 peer->host = NULL;
996 }
997
998 if (peer->domainname) {
999 XFREE(MTYPE_BGP_PEER_HOST, peer->domainname);
1000 peer->domainname = NULL;
1001 }
1002
1003 if (peer->ifname) {
1004 XFREE(MTYPE_BGP_PEER_IFNAME, peer->ifname);
1005 peer->ifname = NULL;
1006 }
1007
1008 /* Update source configuration. */
1009 if (peer->update_source) {
1010 sockunion_free(peer->update_source);
1011 peer->update_source = NULL;
1012 }
1013
1014 if (peer->update_if) {
1015 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
1016 peer->update_if = NULL;
1017 }
1018
1019 if (peer->notify.data)
1020 XFREE(MTYPE_TMP, peer->notify.data);
1021 memset(&peer->notify, 0, sizeof(struct bgp_notify));
1022
1023 if (peer->clear_node_queue)
1024 work_queue_free_and_null(&peer->clear_node_queue);
1025
1026 bgp_sync_delete(peer);
1027
1028 if (peer->conf_if) {
1029 XFREE(MTYPE_PEER_CONF_IF, peer->conf_if);
1030 peer->conf_if = NULL;
1031 }
1032
1033 bfd_info_free(&(peer->bfd_info));
1034
1035 bgp_unlock(peer->bgp);
1036
1037 memset(peer, 0, sizeof(struct peer));
1038
1039 XFREE(MTYPE_BGP_PEER, peer);
1040 }
1041
1042 /* increase reference count on a struct peer */
1043 struct peer *peer_lock_with_caller(const char *name, struct peer *peer)
1044 {
1045 assert(peer && (peer->lock >= 0));
1046
1047 #if 0
1048 zlog_debug("%s peer_lock %p %d", name, peer, peer->lock);
1049 #endif
1050
1051 peer->lock++;
1052
1053 return peer;
1054 }
1055
1056 /* decrease reference count on a struct peer
1057 * struct peer is freed and NULL returned if last reference
1058 */
1059 struct peer *peer_unlock_with_caller(const char *name, struct peer *peer)
1060 {
1061 assert(peer && (peer->lock > 0));
1062
1063 #if 0
1064 zlog_debug("%s peer_unlock %p %d", name, peer, peer->lock);
1065 #endif
1066
1067 peer->lock--;
1068
1069 if (peer->lock == 0) {
1070 peer_free(peer);
1071 return NULL;
1072 }
1073
1074 return peer;
1075 }
1076
1077 /* Allocate new peer object, implicitely locked. */
1078 struct peer *peer_new(struct bgp *bgp)
1079 {
1080 afi_t afi;
1081 safi_t safi;
1082 struct peer *peer;
1083 struct servent *sp;
1084
1085 /* bgp argument is absolutely required */
1086 assert(bgp);
1087 if (!bgp)
1088 return NULL;
1089
1090 /* Allocate new peer. */
1091 peer = XCALLOC(MTYPE_BGP_PEER, sizeof(struct peer));
1092
1093 /* Set default value. */
1094 peer->fd = -1;
1095 peer->v_start = BGP_INIT_START_TIMER;
1096 peer->v_connect = BGP_DEFAULT_CONNECT_RETRY;
1097 peer->status = Idle;
1098 peer->ostatus = Idle;
1099 peer->cur_event = peer->last_event = peer->last_major_event = 0;
1100 peer->bgp = bgp_lock(bgp);
1101 peer = peer_lock(peer); /* initial reference */
1102 peer->password = NULL;
1103
1104 /* Set default flags. */
1105 FOREACH_AFI_SAFI (afi, safi) {
1106 if (!bgp_option_check(BGP_OPT_CONFIG_CISCO)) {
1107 SET_FLAG(peer->af_flags[afi][safi],
1108 PEER_FLAG_SEND_COMMUNITY);
1109 SET_FLAG(peer->af_flags[afi][safi],
1110 PEER_FLAG_SEND_EXT_COMMUNITY);
1111 SET_FLAG(peer->af_flags[afi][safi],
1112 PEER_FLAG_SEND_LARGE_COMMUNITY);
1113
1114 SET_FLAG(peer->af_flags_invert[afi][safi],
1115 PEER_FLAG_SEND_COMMUNITY);
1116 SET_FLAG(peer->af_flags_invert[afi][safi],
1117 PEER_FLAG_SEND_EXT_COMMUNITY);
1118 SET_FLAG(peer->af_flags_invert[afi][safi],
1119 PEER_FLAG_SEND_LARGE_COMMUNITY);
1120 }
1121 }
1122
1123 /* set nexthop-unchanged for l2vpn evpn by default */
1124 SET_FLAG(peer->af_flags[AFI_L2VPN][SAFI_EVPN],
1125 PEER_FLAG_NEXTHOP_UNCHANGED);
1126
1127 SET_FLAG(peer->sflags, PEER_STATUS_CAPABILITY_OPEN);
1128
1129 /* Create buffers. */
1130 peer->ibuf = stream_fifo_new();
1131 peer->obuf = stream_fifo_new();
1132 pthread_mutex_init(&peer->io_mtx, NULL);
1133
1134 /* We use a larger buffer for peer->obuf_work in the event that:
1135 * - We RX a BGP_UPDATE where the attributes alone are just
1136 * under BGP_MAX_PACKET_SIZE
1137 * - The user configures an outbound route-map that does many as-path
1138 * prepends or adds many communities. At most they can have
1139 * CMD_ARGC_MAX args in a route-map so there is a finite limit on how
1140 * large they can make the attributes.
1141 *
1142 * Having a buffer with BGP_MAX_PACKET_SIZE_OVERFLOW allows us to avoid
1143 * bounds checking for every single attribute as we construct an
1144 * UPDATE.
1145 */
1146 peer->obuf_work =
1147 stream_new(BGP_MAX_PACKET_SIZE + BGP_MAX_PACKET_SIZE_OVERFLOW);
1148 peer->ibuf_work =
1149 ringbuf_new(BGP_MAX_PACKET_SIZE * BGP_READ_PACKET_MAX);
1150
1151 peer->scratch = stream_new(BGP_MAX_PACKET_SIZE);
1152
1153 bgp_sync_init(peer);
1154
1155 /* Get service port number. */
1156 sp = getservbyname("bgp", "tcp");
1157 peer->port = (sp == NULL) ? BGP_PORT_DEFAULT : ntohs(sp->s_port);
1158
1159 QOBJ_REG(peer, peer);
1160 return peer;
1161 }
1162
1163 /*
1164 * This function is invoked when a duplicate peer structure associated with
1165 * a neighbor is being deleted. If this about-to-be-deleted structure is
1166 * the one with all the config, then we have to copy over the info.
1167 */
1168 void peer_xfer_config(struct peer *peer_dst, struct peer *peer_src)
1169 {
1170 struct peer_af *paf;
1171 afi_t afi;
1172 safi_t safi;
1173 int afidx;
1174
1175 assert(peer_src);
1176 assert(peer_dst);
1177
1178 /* The following function is used by both peer group config copy to
1179 * individual peer and when we transfer config
1180 */
1181 if (peer_src->change_local_as)
1182 peer_dst->change_local_as = peer_src->change_local_as;
1183
1184 /* peer flags apply */
1185 peer_dst->flags = peer_src->flags;
1186 peer_dst->cap = peer_src->cap;
1187
1188 peer_dst->local_as = peer_src->local_as;
1189 peer_dst->port = peer_src->port;
1190 (void)peer_sort(peer_dst);
1191 peer_dst->rmap_type = peer_src->rmap_type;
1192
1193 /* Timers */
1194 peer_dst->holdtime = peer_src->holdtime;
1195 peer_dst->keepalive = peer_src->keepalive;
1196 peer_dst->connect = peer_src->connect;
1197 peer_dst->v_holdtime = peer_src->v_holdtime;
1198 peer_dst->v_keepalive = peer_src->v_keepalive;
1199 peer_dst->routeadv = peer_src->routeadv;
1200 peer_dst->v_routeadv = peer_src->v_routeadv;
1201
1202 /* password apply */
1203 if (peer_src->password && !peer_dst->password)
1204 peer_dst->password =
1205 XSTRDUP(MTYPE_PEER_PASSWORD, peer_src->password);
1206
1207 FOREACH_AFI_SAFI (afi, safi) {
1208 peer_dst->afc[afi][safi] = peer_src->afc[afi][safi];
1209 peer_dst->af_flags[afi][safi] = peer_src->af_flags[afi][safi];
1210 peer_dst->allowas_in[afi][safi] =
1211 peer_src->allowas_in[afi][safi];
1212 peer_dst->weight[afi][safi] = peer_src->weight[afi][safi];
1213 }
1214
1215 for (afidx = BGP_AF_START; afidx < BGP_AF_MAX; afidx++) {
1216 paf = peer_src->peer_af_array[afidx];
1217 if (paf != NULL)
1218 peer_af_create(peer_dst, paf->afi, paf->safi);
1219 }
1220
1221 /* update-source apply */
1222 if (peer_src->update_source) {
1223 if (peer_dst->update_source)
1224 sockunion_free(peer_dst->update_source);
1225 if (peer_dst->update_if) {
1226 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer_dst->update_if);
1227 peer_dst->update_if = NULL;
1228 }
1229 peer_dst->update_source =
1230 sockunion_dup(peer_src->update_source);
1231 } else if (peer_src->update_if) {
1232 if (peer_dst->update_if)
1233 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer_dst->update_if);
1234 if (peer_dst->update_source) {
1235 sockunion_free(peer_dst->update_source);
1236 peer_dst->update_source = NULL;
1237 }
1238 peer_dst->update_if =
1239 XSTRDUP(MTYPE_PEER_UPDATE_SOURCE, peer_src->update_if);
1240 }
1241
1242 if (peer_src->ifname) {
1243 if (peer_dst->ifname)
1244 XFREE(MTYPE_BGP_PEER_IFNAME, peer_dst->ifname);
1245
1246 peer_dst->ifname =
1247 XSTRDUP(MTYPE_BGP_PEER_IFNAME, peer_src->ifname);
1248 }
1249 }
1250
1251 static int bgp_peer_conf_if_to_su_update_v4(struct peer *peer,
1252 struct interface *ifp)
1253 {
1254 struct connected *ifc;
1255 struct prefix p;
1256 uint32_t addr;
1257 struct listnode *node;
1258
1259 /* If our IPv4 address on the interface is /30 or /31, we can derive the
1260 * IPv4 address of the other end.
1261 */
1262 for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) {
1263 if (ifc->address && (ifc->address->family == AF_INET)) {
1264 PREFIX_COPY_IPV4(&p, CONNECTED_PREFIX(ifc));
1265 if (p.prefixlen == 30) {
1266 peer->su.sa.sa_family = AF_INET;
1267 addr = ntohl(p.u.prefix4.s_addr);
1268 if (addr % 4 == 1)
1269 peer->su.sin.sin_addr.s_addr =
1270 htonl(addr + 1);
1271 else if (addr % 4 == 2)
1272 peer->su.sin.sin_addr.s_addr =
1273 htonl(addr - 1);
1274 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
1275 peer->su.sin.sin_len =
1276 sizeof(struct sockaddr_in);
1277 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
1278 return 1;
1279 } else if (p.prefixlen == 31) {
1280 peer->su.sa.sa_family = AF_INET;
1281 addr = ntohl(p.u.prefix4.s_addr);
1282 if (addr % 2 == 0)
1283 peer->su.sin.sin_addr.s_addr =
1284 htonl(addr + 1);
1285 else
1286 peer->su.sin.sin_addr.s_addr =
1287 htonl(addr - 1);
1288 #ifdef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
1289 peer->su.sin.sin_len =
1290 sizeof(struct sockaddr_in);
1291 #endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
1292 return 1;
1293 } else if (bgp_debug_neighbor_events(peer))
1294 zlog_debug(
1295 "%s: IPv4 interface address is not /30 or /31, v4 session not started",
1296 peer->conf_if);
1297 }
1298 }
1299
1300 return 0;
1301 }
1302
1303 static int bgp_peer_conf_if_to_su_update_v6(struct peer *peer,
1304 struct interface *ifp)
1305 {
1306 struct nbr_connected *ifc_nbr;
1307
1308 /* Have we learnt the peer's IPv6 link-local address? */
1309 if (ifp->nbr_connected
1310 && (ifc_nbr = listnode_head(ifp->nbr_connected))) {
1311 peer->su.sa.sa_family = AF_INET6;
1312 memcpy(&peer->su.sin6.sin6_addr, &ifc_nbr->address->u.prefix,
1313 sizeof(struct in6_addr));
1314 #ifdef SIN6_LEN
1315 peer->su.sin6.sin6_len = sizeof(struct sockaddr_in6);
1316 #endif
1317 peer->su.sin6.sin6_scope_id = ifp->ifindex;
1318 return 1;
1319 }
1320
1321 return 0;
1322 }
1323
1324 /*
1325 * Set or reset the peer address socketunion structure based on the
1326 * learnt/derived peer address. If the address has changed, update the
1327 * password on the listen socket, if needed.
1328 */
1329 void bgp_peer_conf_if_to_su_update(struct peer *peer)
1330 {
1331 struct interface *ifp;
1332 int prev_family;
1333 int peer_addr_updated = 0;
1334
1335 if (!peer->conf_if)
1336 return;
1337
1338 /*
1339 * Our peer structure is stored in the bgp->peerhash
1340 * release it before we modify anything.
1341 */
1342 hash_release(peer->bgp->peerhash, peer);
1343
1344 prev_family = peer->su.sa.sa_family;
1345 if ((ifp = if_lookup_by_name(peer->conf_if, peer->bgp->vrf_id))) {
1346 peer->ifp = ifp;
1347 /* If BGP unnumbered is not "v6only", we first see if we can
1348 * derive the
1349 * peer's IPv4 address.
1350 */
1351 if (!CHECK_FLAG(peer->flags, PEER_FLAG_IFPEER_V6ONLY))
1352 peer_addr_updated =
1353 bgp_peer_conf_if_to_su_update_v4(peer, ifp);
1354
1355 /* If "v6only" or we can't derive peer's IPv4 address, see if
1356 * we've
1357 * learnt the peer's IPv6 link-local address. This is from the
1358 * source
1359 * IPv6 address in router advertisement.
1360 */
1361 if (!peer_addr_updated)
1362 peer_addr_updated =
1363 bgp_peer_conf_if_to_su_update_v6(peer, ifp);
1364 }
1365 /* If we could derive the peer address, we may need to install the
1366 * password
1367 * configured for the peer, if any, on the listen socket. Otherwise,
1368 * mark
1369 * that peer's address is not available and uninstall the password, if
1370 * needed.
1371 */
1372 if (peer_addr_updated) {
1373 if (CHECK_FLAG(peer->flags, PEER_FLAG_PASSWORD)
1374 && prev_family == AF_UNSPEC)
1375 bgp_md5_set(peer);
1376 } else {
1377 if (CHECK_FLAG(peer->flags, PEER_FLAG_PASSWORD)
1378 && prev_family != AF_UNSPEC)
1379 bgp_md5_unset(peer);
1380 peer->su.sa.sa_family = AF_UNSPEC;
1381 memset(&peer->su.sin6.sin6_addr, 0, sizeof(struct in6_addr));
1382 }
1383
1384 /*
1385 * Since our su changed we need to del/add peer to the peerhash
1386 */
1387 hash_get(peer->bgp->peerhash, peer, hash_alloc_intern);
1388 }
1389
1390 static void bgp_recalculate_afi_safi_bestpaths(struct bgp *bgp, afi_t afi,
1391 safi_t safi)
1392 {
1393 struct bgp_node *rn, *nrn;
1394
1395 for (rn = bgp_table_top(bgp->rib[afi][safi]); rn;
1396 rn = bgp_route_next(rn)) {
1397 if (rn->info != NULL) {
1398 /* Special handling for 2-level routing
1399 * tables. */
1400 if (safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP
1401 || safi == SAFI_EVPN) {
1402 for (nrn = bgp_table_top(
1403 (struct bgp_table *)(rn->info));
1404 nrn; nrn = bgp_route_next(nrn))
1405 bgp_process(bgp, nrn, afi, safi);
1406 } else
1407 bgp_process(bgp, rn, afi, safi);
1408 }
1409 }
1410 }
1411
1412 /* Force a bestpath recalculation for all prefixes. This is used
1413 * when 'bgp bestpath' commands are entered.
1414 */
1415 void bgp_recalculate_all_bestpaths(struct bgp *bgp)
1416 {
1417 afi_t afi;
1418 safi_t safi;
1419
1420 FOREACH_AFI_SAFI (afi, safi) {
1421 bgp_recalculate_afi_safi_bestpaths(bgp, afi, safi);
1422 }
1423 }
1424
1425 /*
1426 * Create new BGP peer.
1427 *
1428 * conf_if and su are mutually exclusive if configuring from the cli.
1429 * If we are handing a doppelganger, then we *must* pass in both
1430 * the original peer's su and conf_if, so that we can appropriately
1431 * track the bgp->peerhash( ie we don't want to remove the current
1432 * one from the config ).
1433 */
1434 struct peer *peer_create(union sockunion *su, const char *conf_if,
1435 struct bgp *bgp, as_t local_as, as_t remote_as,
1436 int as_type, afi_t afi, safi_t safi,
1437 struct peer_group *group)
1438 {
1439 int active;
1440 struct peer *peer;
1441 char buf[SU_ADDRSTRLEN];
1442
1443 peer = peer_new(bgp);
1444 if (conf_if) {
1445 peer->conf_if = XSTRDUP(MTYPE_PEER_CONF_IF, conf_if);
1446 if (su)
1447 peer->su = *su;
1448 else
1449 bgp_peer_conf_if_to_su_update(peer);
1450 if (peer->host)
1451 XFREE(MTYPE_BGP_PEER_HOST, peer->host);
1452 peer->host = XSTRDUP(MTYPE_BGP_PEER_HOST, conf_if);
1453 } else if (su) {
1454 peer->su = *su;
1455 sockunion2str(su, buf, SU_ADDRSTRLEN);
1456 if (peer->host)
1457 XFREE(MTYPE_BGP_PEER_HOST, peer->host);
1458 peer->host = XSTRDUP(MTYPE_BGP_PEER_HOST, buf);
1459 }
1460 peer->local_as = local_as;
1461 peer->as = remote_as;
1462 peer->as_type = as_type;
1463 peer->local_id = bgp->router_id;
1464 peer->v_holdtime = bgp->default_holdtime;
1465 peer->v_keepalive = bgp->default_keepalive;
1466 peer->v_routeadv = (peer_sort(peer) == BGP_PEER_IBGP)
1467 ? BGP_DEFAULT_IBGP_ROUTEADV
1468 : BGP_DEFAULT_EBGP_ROUTEADV;
1469
1470 peer = peer_lock(peer); /* bgp peer list reference */
1471 peer->group = group;
1472 listnode_add_sort(bgp->peer, peer);
1473 hash_get(bgp->peerhash, peer, hash_alloc_intern);
1474
1475 /* Adjust update-group coalesce timer heuristics for # peers. */
1476 if (bgp->heuristic_coalesce) {
1477 long ct = BGP_DEFAULT_SUBGROUP_COALESCE_TIME
1478 + (bgp->peer->count
1479 * BGP_PEER_ADJUST_SUBGROUP_COALESCE_TIME);
1480 bgp->coalesce_time = MIN(BGP_MAX_SUBGROUP_COALESCE_TIME, ct);
1481 }
1482
1483 active = peer_active(peer);
1484
1485 /* Last read and reset time set */
1486 peer->readtime = peer->resettime = bgp_clock();
1487
1488 /* Default TTL set. */
1489 peer->ttl = (peer->sort == BGP_PEER_IBGP) ? MAXTTL : 1;
1490
1491 SET_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE);
1492
1493 if (afi && safi) {
1494 peer->afc[afi][safi] = 1;
1495 peer_af_create(peer, afi, safi);
1496 }
1497
1498 /* auto shutdown if configured */
1499 if (bgp->autoshutdown)
1500 peer_flag_set(peer, PEER_FLAG_SHUTDOWN);
1501 /* Set up peer's events and timers. */
1502 else if (!active && peer_active(peer))
1503 bgp_timer_set(peer);
1504
1505 return peer;
1506 }
1507
1508 /* Make accept BGP peer. This function is only called from the test code */
1509 struct peer *peer_create_accept(struct bgp *bgp)
1510 {
1511 struct peer *peer;
1512
1513 peer = peer_new(bgp);
1514
1515 peer = peer_lock(peer); /* bgp peer list reference */
1516 listnode_add_sort(bgp->peer, peer);
1517
1518 return peer;
1519 }
1520
1521 /*
1522 * Return true if we have a peer configured to use this afi/safi
1523 */
1524 int bgp_afi_safi_peer_exists(struct bgp *bgp, afi_t afi, safi_t safi)
1525 {
1526 struct listnode *node;
1527 struct peer *peer;
1528
1529 for (ALL_LIST_ELEMENTS_RO(bgp->peer, node, peer)) {
1530 if (!CHECK_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE))
1531 continue;
1532
1533 if (peer->afc[afi][safi])
1534 return 1;
1535 }
1536
1537 return 0;
1538 }
1539
1540 /* Change peer's AS number. */
1541 void peer_as_change(struct peer *peer, as_t as, int as_specified)
1542 {
1543 bgp_peer_sort_t type;
1544
1545 /* Stop peer. */
1546 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
1547 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
1548 peer->last_reset = PEER_DOWN_REMOTE_AS_CHANGE;
1549 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
1550 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
1551 } else
1552 bgp_session_reset(peer);
1553 }
1554 type = peer_sort(peer);
1555 peer->as = as;
1556 peer->as_type = as_specified;
1557
1558 if (bgp_config_check(peer->bgp, BGP_CONFIG_CONFEDERATION)
1559 && !bgp_confederation_peers_check(peer->bgp, as)
1560 && peer->bgp->as != as)
1561 peer->local_as = peer->bgp->confed_id;
1562 else
1563 peer->local_as = peer->bgp->as;
1564
1565 /* Advertisement-interval reset */
1566 if (!CHECK_FLAG(peer->flags, PEER_FLAG_ROUTEADV)) {
1567 peer->v_routeadv = (peer_sort(peer) == BGP_PEER_IBGP)
1568 ? BGP_DEFAULT_IBGP_ROUTEADV
1569 : BGP_DEFAULT_EBGP_ROUTEADV;
1570 }
1571
1572 /* TTL reset */
1573 if (peer_sort(peer) == BGP_PEER_IBGP)
1574 peer->ttl = MAXTTL;
1575 else if (type == BGP_PEER_IBGP)
1576 peer->ttl = 1;
1577
1578 /* reflector-client reset */
1579 if (peer_sort(peer) != BGP_PEER_IBGP) {
1580 UNSET_FLAG(peer->af_flags[AFI_IP][SAFI_UNICAST],
1581 PEER_FLAG_REFLECTOR_CLIENT);
1582 UNSET_FLAG(peer->af_flags[AFI_IP][SAFI_MULTICAST],
1583 PEER_FLAG_REFLECTOR_CLIENT);
1584 UNSET_FLAG(peer->af_flags[AFI_IP][SAFI_LABELED_UNICAST],
1585 PEER_FLAG_REFLECTOR_CLIENT);
1586 UNSET_FLAG(peer->af_flags[AFI_IP][SAFI_MPLS_VPN],
1587 PEER_FLAG_REFLECTOR_CLIENT);
1588 UNSET_FLAG(peer->af_flags[AFI_IP][SAFI_ENCAP],
1589 PEER_FLAG_REFLECTOR_CLIENT);
1590 UNSET_FLAG(peer->af_flags[AFI_IP][SAFI_FLOWSPEC],
1591 PEER_FLAG_REFLECTOR_CLIENT);
1592 UNSET_FLAG(peer->af_flags[AFI_IP6][SAFI_UNICAST],
1593 PEER_FLAG_REFLECTOR_CLIENT);
1594 UNSET_FLAG(peer->af_flags[AFI_IP6][SAFI_MULTICAST],
1595 PEER_FLAG_REFLECTOR_CLIENT);
1596 UNSET_FLAG(peer->af_flags[AFI_IP6][SAFI_LABELED_UNICAST],
1597 PEER_FLAG_REFLECTOR_CLIENT);
1598 UNSET_FLAG(peer->af_flags[AFI_IP6][SAFI_MPLS_VPN],
1599 PEER_FLAG_REFLECTOR_CLIENT);
1600 UNSET_FLAG(peer->af_flags[AFI_IP6][SAFI_ENCAP],
1601 PEER_FLAG_REFLECTOR_CLIENT);
1602 UNSET_FLAG(peer->af_flags[AFI_IP6][SAFI_FLOWSPEC],
1603 PEER_FLAG_REFLECTOR_CLIENT);
1604 UNSET_FLAG(peer->af_flags[AFI_L2VPN][SAFI_EVPN],
1605 PEER_FLAG_REFLECTOR_CLIENT);
1606 }
1607
1608 /* local-as reset */
1609 if (peer_sort(peer) != BGP_PEER_EBGP) {
1610 peer->change_local_as = 0;
1611 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS);
1612 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND);
1613 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS);
1614 }
1615 }
1616
1617 /* If peer does not exist, create new one. If peer already exists,
1618 set AS number to the peer. */
1619 int peer_remote_as(struct bgp *bgp, union sockunion *su, const char *conf_if,
1620 as_t *as, int as_type, afi_t afi, safi_t safi)
1621 {
1622 struct peer *peer;
1623 as_t local_as;
1624
1625 if (conf_if)
1626 peer = peer_lookup_by_conf_if(bgp, conf_if);
1627 else
1628 peer = peer_lookup(bgp, su);
1629
1630 if (peer) {
1631 /* Not allowed for a dynamic peer. */
1632 if (peer_dynamic_neighbor(peer)) {
1633 *as = peer->as;
1634 return BGP_ERR_INVALID_FOR_DYNAMIC_PEER;
1635 }
1636
1637 /* When this peer is a member of peer-group. */
1638 if (peer->group) {
1639 if (peer->group->conf->as) {
1640 /* Return peer group's AS number. */
1641 *as = peer->group->conf->as;
1642 return BGP_ERR_PEER_GROUP_MEMBER;
1643 }
1644 if (peer_sort(peer->group->conf) == BGP_PEER_IBGP) {
1645 if ((as_type != AS_INTERNAL)
1646 && (bgp->as != *as)) {
1647 *as = peer->as;
1648 return BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT;
1649 }
1650 } else {
1651 if ((as_type != AS_EXTERNAL)
1652 && (bgp->as == *as)) {
1653 *as = peer->as;
1654 return BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT;
1655 }
1656 }
1657 }
1658
1659 /* Existing peer's AS number change. */
1660 if (((peer->as_type == AS_SPECIFIED) && peer->as != *as)
1661 || (peer->as_type != as_type))
1662 peer_as_change(peer, *as, as_type);
1663 } else {
1664 if (conf_if)
1665 return BGP_ERR_NO_INTERFACE_CONFIG;
1666
1667 /* If the peer is not part of our confederation, and its not an
1668 iBGP peer then spoof the source AS */
1669 if (bgp_config_check(bgp, BGP_CONFIG_CONFEDERATION)
1670 && !bgp_confederation_peers_check(bgp, *as)
1671 && bgp->as != *as)
1672 local_as = bgp->confed_id;
1673 else
1674 local_as = bgp->as;
1675
1676 /* If this is IPv4 unicast configuration and "no bgp default
1677 ipv4-unicast" is specified. */
1678
1679 if (bgp_flag_check(bgp, BGP_FLAG_NO_DEFAULT_IPV4)
1680 && afi == AFI_IP && safi == SAFI_UNICAST)
1681 peer_create(su, conf_if, bgp, local_as, *as, as_type, 0,
1682 0, NULL);
1683 else
1684 peer_create(su, conf_if, bgp, local_as, *as, as_type,
1685 afi, safi, NULL);
1686 }
1687
1688 return 0;
1689 }
1690
1691 static void peer_group2peer_config_copy_af(struct peer_group *group,
1692 struct peer *peer, afi_t afi,
1693 safi_t safi)
1694 {
1695 int in = FILTER_IN;
1696 int out = FILTER_OUT;
1697 uint32_t flags_tmp;
1698 uint32_t pflags_ovrd;
1699 uint8_t *pfilter_ovrd;
1700 struct peer *conf;
1701
1702 conf = group->conf;
1703 pflags_ovrd = peer->af_flags_override[afi][safi];
1704 pfilter_ovrd = &peer->filter_override[afi][safi][in];
1705
1706 /* peer af_flags apply */
1707 flags_tmp = conf->af_flags[afi][safi] & ~pflags_ovrd;
1708 flags_tmp ^= conf->af_flags_invert[afi][safi]
1709 ^ peer->af_flags_invert[afi][safi];
1710 flags_tmp &= ~pflags_ovrd;
1711
1712 UNSET_FLAG(peer->af_flags[afi][safi], ~pflags_ovrd);
1713 SET_FLAG(peer->af_flags[afi][safi], flags_tmp);
1714 SET_FLAG(peer->af_flags_invert[afi][safi],
1715 conf->af_flags_invert[afi][safi]);
1716
1717 /* maximum-prefix */
1718 if (!CHECK_FLAG(pflags_ovrd, PEER_FLAG_MAX_PREFIX)) {
1719 PEER_ATTR_INHERIT(peer, group, pmax[afi][safi]);
1720 PEER_ATTR_INHERIT(peer, group, pmax_threshold[afi][safi]);
1721 PEER_ATTR_INHERIT(peer, group, pmax_restart[afi][safi]);
1722 }
1723
1724 /* allowas-in */
1725 if (!CHECK_FLAG(pflags_ovrd, PEER_FLAG_ALLOWAS_IN))
1726 PEER_ATTR_INHERIT(peer, group, allowas_in[afi][safi]);
1727
1728 /* weight */
1729 if (!CHECK_FLAG(pflags_ovrd, PEER_FLAG_WEIGHT))
1730 PEER_ATTR_INHERIT(peer, group, weight[afi][safi]);
1731
1732 /* default-originate route-map */
1733 if (!CHECK_FLAG(pflags_ovrd, PEER_FLAG_DEFAULT_ORIGINATE)) {
1734 PEER_STR_ATTR_INHERIT(peer, group, default_rmap[afi][safi].name,
1735 MTYPE_ROUTE_MAP_NAME);
1736 PEER_ATTR_INHERIT(peer, group, default_rmap[afi][safi].map);
1737 }
1738
1739 /* inbound filter apply */
1740 if (!CHECK_FLAG(pfilter_ovrd[in], PEER_FT_DISTRIBUTE_LIST)) {
1741 PEER_STR_ATTR_INHERIT(peer, group,
1742 filter[afi][safi].dlist[in].name,
1743 MTYPE_BGP_FILTER_NAME);
1744 PEER_ATTR_INHERIT(peer, group,
1745 filter[afi][safi].dlist[in].alist);
1746 }
1747
1748 if (!CHECK_FLAG(pfilter_ovrd[in], PEER_FT_PREFIX_LIST)) {
1749 PEER_STR_ATTR_INHERIT(peer, group,
1750 filter[afi][safi].plist[in].name,
1751 MTYPE_BGP_FILTER_NAME);
1752 PEER_ATTR_INHERIT(peer, group,
1753 filter[afi][safi].plist[in].plist);
1754 }
1755
1756 if (!CHECK_FLAG(pfilter_ovrd[in], PEER_FT_FILTER_LIST)) {
1757 PEER_STR_ATTR_INHERIT(peer, group,
1758 filter[afi][safi].aslist[in].name,
1759 MTYPE_BGP_FILTER_NAME);
1760 PEER_ATTR_INHERIT(peer, group,
1761 filter[afi][safi].aslist[in].aslist);
1762 }
1763
1764 if (!CHECK_FLAG(pfilter_ovrd[RMAP_IN], PEER_FT_ROUTE_MAP)) {
1765 PEER_STR_ATTR_INHERIT(peer, group,
1766 filter[afi][safi].map[in].name,
1767 MTYPE_BGP_FILTER_NAME);
1768 PEER_ATTR_INHERIT(peer, group,
1769 filter[afi][safi].map[RMAP_IN].map);
1770 }
1771
1772 /* outbound filter apply */
1773 if (!CHECK_FLAG(pfilter_ovrd[out], PEER_FT_DISTRIBUTE_LIST)) {
1774 PEER_STR_ATTR_INHERIT(peer, group,
1775 filter[afi][safi].dlist[out].name,
1776 MTYPE_BGP_FILTER_NAME);
1777 PEER_ATTR_INHERIT(peer, group,
1778 filter[afi][safi].dlist[out].alist);
1779 }
1780
1781 if (!CHECK_FLAG(pfilter_ovrd[out], PEER_FT_PREFIX_LIST)) {
1782 PEER_STR_ATTR_INHERIT(peer, group,
1783 filter[afi][safi].plist[out].name,
1784 MTYPE_BGP_FILTER_NAME);
1785 PEER_ATTR_INHERIT(peer, group,
1786 filter[afi][safi].plist[out].plist);
1787 }
1788
1789 if (!CHECK_FLAG(pfilter_ovrd[out], PEER_FT_FILTER_LIST)) {
1790 PEER_STR_ATTR_INHERIT(peer, group,
1791 filter[afi][safi].aslist[out].name,
1792 MTYPE_BGP_FILTER_NAME);
1793 PEER_ATTR_INHERIT(peer, group,
1794 filter[afi][safi].aslist[out].aslist);
1795 }
1796
1797 if (!CHECK_FLAG(pfilter_ovrd[RMAP_OUT], PEER_FT_ROUTE_MAP)) {
1798 PEER_STR_ATTR_INHERIT(peer, group,
1799 filter[afi][safi].map[RMAP_OUT].name,
1800 MTYPE_BGP_FILTER_NAME);
1801 PEER_ATTR_INHERIT(peer, group,
1802 filter[afi][safi].map[RMAP_OUT].map);
1803 }
1804
1805 /* nondirectional filter apply */
1806 if (!CHECK_FLAG(pfilter_ovrd[0], PEER_FT_UNSUPPRESS_MAP)) {
1807 PEER_STR_ATTR_INHERIT(peer, group, filter[afi][safi].usmap.name,
1808 MTYPE_BGP_FILTER_NAME);
1809 PEER_ATTR_INHERIT(peer, group, filter[afi][safi].usmap.map);
1810 }
1811 }
1812
1813 static int peer_activate_af(struct peer *peer, afi_t afi, safi_t safi)
1814 {
1815 int active;
1816 struct peer *other;
1817
1818 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
1819 flog_err(EC_BGP_PEER_GROUP, "%s was called for peer-group %s",
1820 __func__, peer->host);
1821 return 1;
1822 }
1823
1824 /* Do not activate a peer for both SAFI_UNICAST and SAFI_LABELED_UNICAST
1825 */
1826 if ((safi == SAFI_UNICAST && peer->afc[afi][SAFI_LABELED_UNICAST])
1827 || (safi == SAFI_LABELED_UNICAST && peer->afc[afi][SAFI_UNICAST]))
1828 return BGP_ERR_PEER_SAFI_CONFLICT;
1829
1830 /* Nothing to do if we've already activated this peer */
1831 if (peer->afc[afi][safi])
1832 return 0;
1833
1834 if (peer_af_create(peer, afi, safi) == NULL)
1835 return 1;
1836
1837 active = peer_active(peer);
1838 peer->afc[afi][safi] = 1;
1839
1840 if (peer->group)
1841 peer_group2peer_config_copy_af(peer->group, peer, afi, safi);
1842
1843 if (!active && peer_active(peer)) {
1844 bgp_timer_set(peer);
1845 } else {
1846 if (peer->status == Established) {
1847 if (CHECK_FLAG(peer->cap, PEER_CAP_DYNAMIC_RCV)) {
1848 peer->afc_adv[afi][safi] = 1;
1849 bgp_capability_send(peer, afi, safi,
1850 CAPABILITY_CODE_MP,
1851 CAPABILITY_ACTION_SET);
1852 if (peer->afc_recv[afi][safi]) {
1853 peer->afc_nego[afi][safi] = 1;
1854 bgp_announce_route(peer, afi, safi);
1855 }
1856 } else {
1857 peer->last_reset = PEER_DOWN_AF_ACTIVATE;
1858 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
1859 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
1860 }
1861 }
1862 if (peer->status == OpenSent || peer->status == OpenConfirm) {
1863 peer->last_reset = PEER_DOWN_AF_ACTIVATE;
1864 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
1865 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
1866 }
1867 /*
1868 * If we are turning on a AFI/SAFI locally and we've
1869 * started bringing a peer up, we need to tell
1870 * the other peer to restart because we might loose
1871 * configuration here because when the doppelganger
1872 * gets to a established state due to how
1873 * we resolve we could just overwrite the afi/safi
1874 * activation.
1875 */
1876 other = peer->doppelganger;
1877 if (other
1878 && (other->status == OpenSent
1879 || other->status == OpenConfirm)) {
1880 other->last_reset = PEER_DOWN_AF_ACTIVATE;
1881 bgp_notify_send(other, BGP_NOTIFY_CEASE,
1882 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
1883 }
1884 }
1885
1886 return 0;
1887 }
1888
1889 /* Activate the peer or peer group for specified AFI and SAFI. */
1890 int peer_activate(struct peer *peer, afi_t afi, safi_t safi)
1891 {
1892 int ret = 0;
1893 struct peer_group *group;
1894 struct listnode *node, *nnode;
1895 struct peer *tmp_peer;
1896 struct bgp *bgp;
1897
1898 /* Nothing to do if we've already activated this peer */
1899 if (peer->afc[afi][safi])
1900 return ret;
1901
1902 bgp = peer->bgp;
1903
1904 /* This is a peer-group so activate all of the members of the
1905 * peer-group as well */
1906 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
1907
1908 /* Do not activate a peer for both SAFI_UNICAST and
1909 * SAFI_LABELED_UNICAST */
1910 if ((safi == SAFI_UNICAST
1911 && peer->afc[afi][SAFI_LABELED_UNICAST])
1912 || (safi == SAFI_LABELED_UNICAST
1913 && peer->afc[afi][SAFI_UNICAST]))
1914 return BGP_ERR_PEER_SAFI_CONFLICT;
1915
1916 peer->afc[afi][safi] = 1;
1917 group = peer->group;
1918
1919 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, tmp_peer)) {
1920 ret |= peer_activate_af(tmp_peer, afi, safi);
1921 }
1922 } else {
1923 ret |= peer_activate_af(peer, afi, safi);
1924 }
1925
1926 /* If this is the first peer to be activated for this
1927 * afi/labeled-unicast recalc bestpaths to trigger label allocation */
1928 if (safi == SAFI_LABELED_UNICAST
1929 && !bgp->allocate_mpls_labels[afi][SAFI_UNICAST]) {
1930
1931 if (BGP_DEBUG(zebra, ZEBRA))
1932 zlog_info(
1933 "peer(s) are now active for labeled-unicast, allocate MPLS labels");
1934
1935 bgp->allocate_mpls_labels[afi][SAFI_UNICAST] = 1;
1936 bgp_recalculate_afi_safi_bestpaths(bgp, afi, SAFI_UNICAST);
1937 }
1938
1939 if (safi == SAFI_FLOWSPEC) {
1940 /* connect to table manager */
1941 bgp_zebra_init_tm_connect(bgp);
1942 }
1943 return ret;
1944 }
1945
1946 static int non_peergroup_deactivate_af(struct peer *peer, afi_t afi,
1947 safi_t safi)
1948 {
1949 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
1950 flog_err(EC_BGP_PEER_GROUP, "%s was called for peer-group %s",
1951 __func__, peer->host);
1952 return 1;
1953 }
1954
1955 /* Nothing to do if we've already deactivated this peer */
1956 if (!peer->afc[afi][safi])
1957 return 0;
1958
1959 /* De-activate the address family configuration. */
1960 peer->afc[afi][safi] = 0;
1961
1962 if (peer_af_delete(peer, afi, safi) != 0) {
1963 flog_err(EC_BGP_PEER_DELETE,
1964 "couldn't delete af structure for peer %s",
1965 peer->host);
1966 return 1;
1967 }
1968
1969 if (peer->status == Established) {
1970 if (CHECK_FLAG(peer->cap, PEER_CAP_DYNAMIC_RCV)) {
1971 peer->afc_adv[afi][safi] = 0;
1972 peer->afc_nego[afi][safi] = 0;
1973
1974 if (peer_active_nego(peer)) {
1975 bgp_capability_send(peer, afi, safi,
1976 CAPABILITY_CODE_MP,
1977 CAPABILITY_ACTION_UNSET);
1978 bgp_clear_route(peer, afi, safi);
1979 peer->pcount[afi][safi] = 0;
1980 } else {
1981 peer->last_reset = PEER_DOWN_NEIGHBOR_DELETE;
1982 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
1983 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
1984 }
1985 } else {
1986 peer->last_reset = PEER_DOWN_NEIGHBOR_DELETE;
1987 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
1988 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
1989 }
1990 }
1991
1992 return 0;
1993 }
1994
1995 int peer_deactivate(struct peer *peer, afi_t afi, safi_t safi)
1996 {
1997 int ret = 0;
1998 struct peer_group *group;
1999 struct peer *tmp_peer;
2000 struct listnode *node, *nnode;
2001 struct bgp *bgp;
2002
2003 /* Nothing to do if we've already de-activated this peer */
2004 if (!peer->afc[afi][safi])
2005 return ret;
2006
2007 /* This is a peer-group so de-activate all of the members of the
2008 * peer-group as well */
2009 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
2010 peer->afc[afi][safi] = 0;
2011 group = peer->group;
2012
2013 if (peer_af_delete(peer, afi, safi) != 0) {
2014 flog_err(EC_BGP_PEER_DELETE,
2015 "couldn't delete af structure for peer %s",
2016 peer->host);
2017 }
2018
2019 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, tmp_peer)) {
2020 ret |= non_peergroup_deactivate_af(tmp_peer, afi, safi);
2021 }
2022 } else {
2023 ret |= non_peergroup_deactivate_af(peer, afi, safi);
2024 }
2025
2026 bgp = peer->bgp;
2027
2028 /* If this is the last peer to be deactivated for this
2029 * afi/labeled-unicast recalc bestpaths to trigger label deallocation */
2030 if (safi == SAFI_LABELED_UNICAST
2031 && bgp->allocate_mpls_labels[afi][SAFI_UNICAST]
2032 && !bgp_afi_safi_peer_exists(bgp, afi, safi)) {
2033
2034 if (BGP_DEBUG(zebra, ZEBRA))
2035 zlog_info(
2036 "peer(s) are no longer active for labeled-unicast, deallocate MPLS labels");
2037
2038 bgp->allocate_mpls_labels[afi][SAFI_UNICAST] = 0;
2039 bgp_recalculate_afi_safi_bestpaths(bgp, afi, SAFI_UNICAST);
2040 }
2041 return ret;
2042 }
2043
2044 int peer_afc_set(struct peer *peer, afi_t afi, safi_t safi, int enable)
2045 {
2046 if (enable)
2047 return peer_activate(peer, afi, safi);
2048 else
2049 return peer_deactivate(peer, afi, safi);
2050 }
2051
2052 static void peer_nsf_stop(struct peer *peer)
2053 {
2054 afi_t afi;
2055 safi_t safi;
2056
2057 UNSET_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT);
2058 UNSET_FLAG(peer->sflags, PEER_STATUS_NSF_MODE);
2059
2060 for (afi = AFI_IP; afi < AFI_MAX; afi++)
2061 for (safi = SAFI_UNICAST; safi <= SAFI_MPLS_VPN; safi++)
2062 peer->nsf[afi][safi] = 0;
2063
2064 if (peer->t_gr_restart) {
2065 BGP_TIMER_OFF(peer->t_gr_restart);
2066 if (bgp_debug_neighbor_events(peer))
2067 zlog_debug("%s graceful restart timer stopped",
2068 peer->host);
2069 }
2070 if (peer->t_gr_stale) {
2071 BGP_TIMER_OFF(peer->t_gr_stale);
2072 if (bgp_debug_neighbor_events(peer))
2073 zlog_debug(
2074 "%s graceful restart stalepath timer stopped",
2075 peer->host);
2076 }
2077 bgp_clear_route_all(peer);
2078 }
2079
2080 /* Delete peer from confguration.
2081 *
2082 * The peer is moved to a dead-end "Deleted" neighbour-state, to allow
2083 * it to "cool off" and refcounts to hit 0, at which state it is freed.
2084 *
2085 * This function /should/ take care to be idempotent, to guard against
2086 * it being called multiple times through stray events that come in
2087 * that happen to result in this function being called again. That
2088 * said, getting here for a "Deleted" peer is a bug in the neighbour
2089 * FSM.
2090 */
2091 int peer_delete(struct peer *peer)
2092 {
2093 int i;
2094 afi_t afi;
2095 safi_t safi;
2096 struct bgp *bgp;
2097 struct bgp_filter *filter;
2098 struct listnode *pn;
2099 int accept_peer;
2100
2101 assert(peer->status != Deleted);
2102
2103 bgp = peer->bgp;
2104 accept_peer = CHECK_FLAG(peer->sflags, PEER_STATUS_ACCEPT_PEER);
2105
2106 bgp_reads_off(peer);
2107 bgp_writes_off(peer);
2108 assert(!CHECK_FLAG(peer->thread_flags, PEER_THREAD_WRITES_ON));
2109 assert(!CHECK_FLAG(peer->thread_flags, PEER_THREAD_READS_ON));
2110
2111 if (CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT))
2112 peer_nsf_stop(peer);
2113
2114 SET_FLAG(peer->flags, PEER_FLAG_DELETE);
2115
2116 /* If this peer belongs to peer group, clear up the
2117 relationship. */
2118 if (peer->group) {
2119 if (peer_dynamic_neighbor(peer))
2120 peer_drop_dynamic_neighbor(peer);
2121
2122 if ((pn = listnode_lookup(peer->group->peer, peer))) {
2123 peer = peer_unlock(
2124 peer); /* group->peer list reference */
2125 list_delete_node(peer->group->peer, pn);
2126 }
2127 peer->group = NULL;
2128 }
2129
2130 /* Withdraw all information from routing table. We can not use
2131 * BGP_EVENT_ADD (peer, BGP_Stop) at here. Because the event is
2132 * executed after peer structure is deleted.
2133 */
2134 peer->last_reset = PEER_DOWN_NEIGHBOR_DELETE;
2135 bgp_stop(peer);
2136 UNSET_FLAG(peer->flags, PEER_FLAG_DELETE);
2137
2138 if (peer->doppelganger) {
2139 peer->doppelganger->doppelganger = NULL;
2140 peer->doppelganger = NULL;
2141 }
2142
2143 UNSET_FLAG(peer->sflags, PEER_STATUS_ACCEPT_PEER);
2144 bgp_fsm_change_status(peer, Deleted);
2145
2146 /* Remove from NHT */
2147 if (CHECK_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE))
2148 bgp_unlink_nexthop_by_peer(peer);
2149
2150 /* Password configuration */
2151 if (CHECK_FLAG(peer->flags, PEER_FLAG_PASSWORD)) {
2152 XFREE(MTYPE_PEER_PASSWORD, peer->password);
2153
2154 if (!accept_peer && !BGP_PEER_SU_UNSPEC(peer)
2155 && !CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
2156 bgp_md5_unset(peer);
2157 }
2158
2159 bgp_timer_set(peer); /* stops all timers for Deleted */
2160
2161 /* Delete from all peer list. */
2162 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)
2163 && (pn = listnode_lookup(bgp->peer, peer))) {
2164 peer_unlock(peer); /* bgp peer list reference */
2165 list_delete_node(bgp->peer, pn);
2166 hash_release(bgp->peerhash, peer);
2167 }
2168
2169 /* Buffers. */
2170 if (peer->ibuf) {
2171 stream_fifo_free(peer->ibuf);
2172 peer->ibuf = NULL;
2173 }
2174
2175 if (peer->obuf) {
2176 stream_fifo_free(peer->obuf);
2177 peer->obuf = NULL;
2178 }
2179
2180 if (peer->ibuf_work) {
2181 ringbuf_del(peer->ibuf_work);
2182 peer->ibuf_work = NULL;
2183 }
2184
2185 if (peer->obuf_work) {
2186 stream_free(peer->obuf_work);
2187 peer->obuf_work = NULL;
2188 }
2189
2190 if (peer->scratch) {
2191 stream_free(peer->scratch);
2192 peer->scratch = NULL;
2193 }
2194
2195 /* Local and remote addresses. */
2196 if (peer->su_local) {
2197 sockunion_free(peer->su_local);
2198 peer->su_local = NULL;
2199 }
2200
2201 if (peer->su_remote) {
2202 sockunion_free(peer->su_remote);
2203 peer->su_remote = NULL;
2204 }
2205
2206 /* Free filter related memory. */
2207 FOREACH_AFI_SAFI (afi, safi) {
2208 filter = &peer->filter[afi][safi];
2209
2210 for (i = FILTER_IN; i < FILTER_MAX; i++) {
2211 if (filter->dlist[i].name) {
2212 XFREE(MTYPE_BGP_FILTER_NAME,
2213 filter->dlist[i].name);
2214 filter->dlist[i].name = NULL;
2215 }
2216
2217 if (filter->plist[i].name) {
2218 XFREE(MTYPE_BGP_FILTER_NAME,
2219 filter->plist[i].name);
2220 filter->plist[i].name = NULL;
2221 }
2222
2223 if (filter->aslist[i].name) {
2224 XFREE(MTYPE_BGP_FILTER_NAME,
2225 filter->aslist[i].name);
2226 filter->aslist[i].name = NULL;
2227 }
2228 }
2229
2230 for (i = RMAP_IN; i < RMAP_MAX; i++) {
2231 if (filter->map[i].name) {
2232 XFREE(MTYPE_BGP_FILTER_NAME,
2233 filter->map[i].name);
2234 filter->map[i].name = NULL;
2235 }
2236 }
2237
2238 if (filter->usmap.name) {
2239 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
2240 filter->usmap.name = NULL;
2241 }
2242
2243 if (peer->default_rmap[afi][safi].name) {
2244 XFREE(MTYPE_ROUTE_MAP_NAME,
2245 peer->default_rmap[afi][safi].name);
2246 peer->default_rmap[afi][safi].name = NULL;
2247 }
2248 }
2249
2250 FOREACH_AFI_SAFI (afi, safi)
2251 peer_af_delete(peer, afi, safi);
2252
2253 if (peer->hostname) {
2254 XFREE(MTYPE_BGP_PEER_HOST, peer->hostname);
2255 peer->hostname = NULL;
2256 }
2257
2258 if (peer->domainname) {
2259 XFREE(MTYPE_BGP_PEER_HOST, peer->domainname);
2260 peer->domainname = NULL;
2261 }
2262
2263 peer_unlock(peer); /* initial reference */
2264
2265 return 0;
2266 }
2267
2268 static int peer_group_cmp(struct peer_group *g1, struct peer_group *g2)
2269 {
2270 return strcmp(g1->name, g2->name);
2271 }
2272
2273 /* Peer group cofiguration. */
2274 static struct peer_group *peer_group_new(void)
2275 {
2276 return (struct peer_group *)XCALLOC(MTYPE_PEER_GROUP,
2277 sizeof(struct peer_group));
2278 }
2279
2280 static void peer_group_free(struct peer_group *group)
2281 {
2282 XFREE(MTYPE_PEER_GROUP, group);
2283 }
2284
2285 struct peer_group *peer_group_lookup(struct bgp *bgp, const char *name)
2286 {
2287 struct peer_group *group;
2288 struct listnode *node, *nnode;
2289
2290 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
2291 if (strcmp(group->name, name) == 0)
2292 return group;
2293 }
2294 return NULL;
2295 }
2296
2297 struct peer_group *peer_group_get(struct bgp *bgp, const char *name)
2298 {
2299 struct peer_group *group;
2300 afi_t afi;
2301
2302 group = peer_group_lookup(bgp, name);
2303 if (group)
2304 return group;
2305
2306 group = peer_group_new();
2307 group->bgp = bgp;
2308 if (group->name)
2309 XFREE(MTYPE_PEER_GROUP_HOST, group->name);
2310 group->name = XSTRDUP(MTYPE_PEER_GROUP_HOST, name);
2311 group->peer = list_new();
2312 for (afi = AFI_IP; afi < AFI_MAX; afi++)
2313 group->listen_range[afi] = list_new();
2314 group->conf = peer_new(bgp);
2315 if (!bgp_flag_check(bgp, BGP_FLAG_NO_DEFAULT_IPV4))
2316 group->conf->afc[AFI_IP][SAFI_UNICAST] = 1;
2317 if (group->conf->host)
2318 XFREE(MTYPE_BGP_PEER_HOST, group->conf->host);
2319 group->conf->host = XSTRDUP(MTYPE_BGP_PEER_HOST, name);
2320 group->conf->group = group;
2321 group->conf->as = 0;
2322 group->conf->ttl = 1;
2323 group->conf->gtsm_hops = 0;
2324 group->conf->v_routeadv = BGP_DEFAULT_EBGP_ROUTEADV;
2325 SET_FLAG(group->conf->sflags, PEER_STATUS_GROUP);
2326 listnode_add_sort(bgp->group, group);
2327
2328 return group;
2329 }
2330
2331 static void peer_group2peer_config_copy(struct peer_group *group,
2332 struct peer *peer)
2333 {
2334 uint32_t flags_tmp;
2335 struct peer *conf;
2336
2337 conf = group->conf;
2338
2339 /* remote-as */
2340 if (conf->as)
2341 peer->as = conf->as;
2342
2343 /* local-as */
2344 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_LOCAL_AS))
2345 peer->change_local_as = conf->change_local_as;
2346
2347 /* TTL */
2348 peer->ttl = conf->ttl;
2349
2350 /* GTSM hops */
2351 peer->gtsm_hops = conf->gtsm_hops;
2352
2353 /* peer flags apply */
2354 flags_tmp = conf->flags & ~peer->flags_override;
2355 flags_tmp ^= conf->flags_invert ^ peer->flags_invert;
2356 flags_tmp &= ~peer->flags_override;
2357
2358 UNSET_FLAG(peer->flags, ~peer->flags_override);
2359 SET_FLAG(peer->flags, flags_tmp);
2360 SET_FLAG(peer->flags_invert, conf->flags_invert);
2361
2362 /* peer timers apply */
2363 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_TIMER)) {
2364 PEER_ATTR_INHERIT(peer, group, holdtime);
2365 PEER_ATTR_INHERIT(peer, group, keepalive);
2366 }
2367
2368 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_TIMER_CONNECT)) {
2369 PEER_ATTR_INHERIT(peer, group, connect);
2370 if (CHECK_FLAG(conf->flags, PEER_FLAG_TIMER_CONNECT))
2371 peer->v_connect = conf->connect;
2372 else
2373 peer->v_connect = BGP_DEFAULT_CONNECT_RETRY;
2374 }
2375
2376 /* advertisement-interval apply */
2377 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_ROUTEADV)) {
2378 PEER_ATTR_INHERIT(peer, group, routeadv);
2379 if (CHECK_FLAG(conf->flags, PEER_FLAG_ROUTEADV))
2380 peer->v_routeadv = conf->routeadv;
2381 else
2382 peer->v_routeadv = (peer_sort(peer) == BGP_PEER_IBGP)
2383 ? BGP_DEFAULT_IBGP_ROUTEADV
2384 : BGP_DEFAULT_EBGP_ROUTEADV;
2385 }
2386
2387 /* password apply */
2388 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_PASSWORD))
2389 PEER_STR_ATTR_INHERIT(peer, group, password,
2390 MTYPE_PEER_PASSWORD);
2391
2392 if (!BGP_PEER_SU_UNSPEC(peer))
2393 bgp_md5_set(peer);
2394
2395 /* update-source apply */
2396 if (!CHECK_FLAG(peer->flags_override, PEER_FLAG_UPDATE_SOURCE)) {
2397 if (conf->update_source) {
2398 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
2399 PEER_SU_ATTR_INHERIT(peer, group, update_source);
2400 } else if (conf->update_if) {
2401 sockunion_free(peer->update_source);
2402 PEER_STR_ATTR_INHERIT(peer, group, update_if,
2403 MTYPE_PEER_UPDATE_SOURCE);
2404 }
2405 }
2406
2407 bgp_bfd_peer_group2peer_copy(conf, peer);
2408 }
2409
2410 /* Peer group's remote AS configuration. */
2411 int peer_group_remote_as(struct bgp *bgp, const char *group_name, as_t *as,
2412 int as_type)
2413 {
2414 struct peer_group *group;
2415 struct peer *peer;
2416 struct listnode *node, *nnode;
2417
2418 group = peer_group_lookup(bgp, group_name);
2419 if (!group)
2420 return -1;
2421
2422 if ((as_type == group->conf->as_type) && (group->conf->as == *as))
2423 return 0;
2424
2425
2426 /* When we setup peer-group AS number all peer group member's AS
2427 number must be updated to same number. */
2428 peer_as_change(group->conf, *as, as_type);
2429
2430 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
2431 if (((peer->as_type == AS_SPECIFIED) && peer->as != *as)
2432 || (peer->as_type != as_type))
2433 peer_as_change(peer, *as, as_type);
2434 }
2435
2436 return 0;
2437 }
2438
2439 int peer_group_delete(struct peer_group *group)
2440 {
2441 struct bgp *bgp;
2442 struct peer *peer;
2443 struct prefix *prefix;
2444 struct peer *other;
2445 struct listnode *node, *nnode;
2446 afi_t afi;
2447
2448 bgp = group->bgp;
2449
2450 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
2451 other = peer->doppelganger;
2452 peer_delete(peer);
2453 if (other && other->status != Deleted) {
2454 other->group = NULL;
2455 peer_delete(other);
2456 }
2457 }
2458 list_delete(&group->peer);
2459
2460 for (afi = AFI_IP; afi < AFI_MAX; afi++) {
2461 for (ALL_LIST_ELEMENTS(group->listen_range[afi], node, nnode,
2462 prefix)) {
2463 prefix_free(prefix);
2464 }
2465 list_delete(&group->listen_range[afi]);
2466 }
2467
2468 XFREE(MTYPE_PEER_GROUP_HOST, group->name);
2469 group->name = NULL;
2470
2471 bfd_info_free(&(group->conf->bfd_info));
2472
2473 group->conf->group = NULL;
2474 peer_delete(group->conf);
2475
2476 /* Delete from all peer_group list. */
2477 listnode_delete(bgp->group, group);
2478
2479 peer_group_free(group);
2480
2481 return 0;
2482 }
2483
2484 int peer_group_remote_as_delete(struct peer_group *group)
2485 {
2486 struct peer *peer, *other;
2487 struct listnode *node, *nnode;
2488
2489 if ((group->conf->as_type == AS_UNSPECIFIED)
2490 || ((!group->conf->as) && (group->conf->as_type == AS_SPECIFIED)))
2491 return 0;
2492
2493 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
2494 other = peer->doppelganger;
2495
2496 peer_delete(peer);
2497
2498 if (other && other->status != Deleted) {
2499 other->group = NULL;
2500 peer_delete(other);
2501 }
2502 }
2503 list_delete_all_node(group->peer);
2504
2505 group->conf->as = 0;
2506 group->conf->as_type = AS_UNSPECIFIED;
2507
2508 return 0;
2509 }
2510
2511 int peer_group_listen_range_add(struct peer_group *group, struct prefix *range)
2512 {
2513 struct prefix *prefix;
2514 struct listnode *node, *nnode;
2515 afi_t afi;
2516
2517 afi = family2afi(range->family);
2518
2519 /* Group needs remote AS configured. */
2520 if (group->conf->as_type == AS_UNSPECIFIED)
2521 return BGP_ERR_PEER_GROUP_NO_REMOTE_AS;
2522
2523 /* Ensure no duplicates. Currently we don't care about overlaps. */
2524 for (ALL_LIST_ELEMENTS(group->listen_range[afi], node, nnode, prefix)) {
2525 if (prefix_same(range, prefix))
2526 return 0;
2527 }
2528
2529 prefix = prefix_new();
2530 prefix_copy(prefix, range);
2531 listnode_add(group->listen_range[afi], prefix);
2532 return 0;
2533 }
2534
2535 int peer_group_listen_range_del(struct peer_group *group, struct prefix *range)
2536 {
2537 struct prefix *prefix, prefix2;
2538 struct listnode *node, *nnode;
2539 struct peer *peer;
2540 afi_t afi;
2541 char buf[PREFIX2STR_BUFFER];
2542
2543 afi = family2afi(range->family);
2544
2545 /* Identify the listen range. */
2546 for (ALL_LIST_ELEMENTS(group->listen_range[afi], node, nnode, prefix)) {
2547 if (prefix_same(range, prefix))
2548 break;
2549 }
2550
2551 if (!prefix)
2552 return BGP_ERR_DYNAMIC_NEIGHBORS_RANGE_NOT_FOUND;
2553
2554 prefix2str(prefix, buf, sizeof(buf));
2555
2556 /* Dispose off any dynamic neighbors that exist due to this listen range
2557 */
2558 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
2559 if (!peer_dynamic_neighbor(peer))
2560 continue;
2561
2562 sockunion2hostprefix(&peer->su, &prefix2);
2563 if (prefix_match(prefix, &prefix2)) {
2564 if (bgp_debug_neighbor_events(peer))
2565 zlog_debug(
2566 "Deleting dynamic neighbor %s group %s upon "
2567 "delete of listen range %s",
2568 peer->host, group->name, buf);
2569 peer_delete(peer);
2570 }
2571 }
2572
2573 /* Get rid of the listen range */
2574 listnode_delete(group->listen_range[afi], prefix);
2575
2576 return 0;
2577 }
2578
2579 /* Bind specified peer to peer group. */
2580 int peer_group_bind(struct bgp *bgp, union sockunion *su, struct peer *peer,
2581 struct peer_group *group, as_t *as)
2582 {
2583 int first_member = 0;
2584 afi_t afi;
2585 safi_t safi;
2586
2587 /* Lookup the peer. */
2588 if (!peer)
2589 peer = peer_lookup(bgp, su);
2590
2591 /* The peer exist, bind it to the peer-group */
2592 if (peer) {
2593 /* When the peer already belongs to a peer-group, check the
2594 * consistency. */
2595 if (peer_group_active(peer)) {
2596
2597 /* The peer is already bound to the peer-group,
2598 * nothing to do
2599 */
2600 if (strcmp(peer->group->name, group->name) == 0)
2601 return 0;
2602 else
2603 return BGP_ERR_PEER_GROUP_CANT_CHANGE;
2604 }
2605
2606 /* The peer has not specified a remote-as, inherit it from the
2607 * peer-group */
2608 if (peer->as_type == AS_UNSPECIFIED) {
2609 peer->as_type = group->conf->as_type;
2610 peer->as = group->conf->as;
2611 }
2612
2613 if (!group->conf->as) {
2614 if (peer_sort(group->conf) != BGP_PEER_INTERNAL
2615 && peer_sort(group->conf) != peer_sort(peer)) {
2616 if (as)
2617 *as = peer->as;
2618 return BGP_ERR_PEER_GROUP_PEER_TYPE_DIFFERENT;
2619 }
2620
2621 if (peer_sort(group->conf) == BGP_PEER_INTERNAL)
2622 first_member = 1;
2623 }
2624
2625 peer_group2peer_config_copy(group, peer);
2626
2627 FOREACH_AFI_SAFI (afi, safi) {
2628 if (group->conf->afc[afi][safi]) {
2629 peer->afc[afi][safi] = 1;
2630
2631 if (peer_af_find(peer, afi, safi)
2632 || peer_af_create(peer, afi, safi)) {
2633 peer_group2peer_config_copy_af(
2634 group, peer, afi, safi);
2635 }
2636 } else if (peer->afc[afi][safi])
2637 peer_deactivate(peer, afi, safi);
2638 }
2639
2640 if (peer->group) {
2641 assert(group && peer->group == group);
2642 } else {
2643 listnode_delete(bgp->peer, peer);
2644
2645 peer->group = group;
2646 listnode_add_sort(bgp->peer, peer);
2647
2648 peer = peer_lock(peer); /* group->peer list reference */
2649 listnode_add(group->peer, peer);
2650 }
2651
2652 if (first_member) {
2653 /* Advertisement-interval reset */
2654 if (!CHECK_FLAG(group->conf->flags,
2655 PEER_FLAG_ROUTEADV)) {
2656 group->conf->v_routeadv =
2657 (peer_sort(group->conf)
2658 == BGP_PEER_IBGP)
2659 ? BGP_DEFAULT_IBGP_ROUTEADV
2660 : BGP_DEFAULT_EBGP_ROUTEADV;
2661 }
2662
2663 /* ebgp-multihop reset */
2664 if (peer_sort(group->conf) == BGP_PEER_IBGP)
2665 group->conf->ttl = MAXTTL;
2666
2667 /* local-as reset */
2668 if (peer_sort(group->conf) != BGP_PEER_EBGP) {
2669 group->conf->change_local_as = 0;
2670 peer_flag_unset(group->conf,
2671 PEER_FLAG_LOCAL_AS);
2672 peer_flag_unset(group->conf,
2673 PEER_FLAG_LOCAL_AS_NO_PREPEND);
2674 peer_flag_unset(group->conf,
2675 PEER_FLAG_LOCAL_AS_REPLACE_AS);
2676 }
2677 }
2678
2679 SET_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE);
2680
2681 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
2682 peer->last_reset = PEER_DOWN_RMAP_BIND;
2683 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
2684 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
2685 } else {
2686 bgp_session_reset(peer);
2687 }
2688 }
2689
2690 /* Create a new peer. */
2691 else {
2692 if ((group->conf->as_type == AS_SPECIFIED)
2693 && (!group->conf->as)) {
2694 return BGP_ERR_PEER_GROUP_NO_REMOTE_AS;
2695 }
2696
2697 peer = peer_create(su, NULL, bgp, bgp->as, group->conf->as,
2698 group->conf->as_type, 0, 0, group);
2699
2700 peer = peer_lock(peer); /* group->peer list reference */
2701 listnode_add(group->peer, peer);
2702
2703 peer_group2peer_config_copy(group, peer);
2704
2705 /* If the peer-group is active for this afi/safi then activate
2706 * for this peer */
2707 FOREACH_AFI_SAFI (afi, safi) {
2708 if (group->conf->afc[afi][safi]) {
2709 peer->afc[afi][safi] = 1;
2710 peer_af_create(peer, afi, safi);
2711 peer_group2peer_config_copy_af(group, peer, afi,
2712 safi);
2713 } else if (peer->afc[afi][safi])
2714 peer_deactivate(peer, afi, safi);
2715 }
2716
2717 SET_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE);
2718
2719 /* Set up peer's events and timers. */
2720 if (peer_active(peer))
2721 bgp_timer_set(peer);
2722 }
2723
2724 return 0;
2725 }
2726
2727 static int bgp_startup_timer_expire(struct thread *thread)
2728 {
2729 struct bgp *bgp;
2730
2731 bgp = THREAD_ARG(thread);
2732 bgp->t_startup = NULL;
2733
2734 return 0;
2735 }
2736
2737 /*
2738 * On shutdown we call the cleanup function which
2739 * does a free of the link list nodes, free up
2740 * the data we are pointing at too.
2741 */
2742 static void bgp_vrf_string_name_delete(void *data)
2743 {
2744 char *vname = data;
2745
2746 XFREE(MTYPE_TMP, vname);
2747 }
2748
2749 /* BGP instance creation by `router bgp' commands. */
2750 static struct bgp *bgp_create(as_t *as, const char *name,
2751 enum bgp_instance_type inst_type)
2752 {
2753 struct bgp *bgp;
2754 afi_t afi;
2755 safi_t safi;
2756
2757 if ((bgp = XCALLOC(MTYPE_BGP, sizeof(struct bgp))) == NULL)
2758 return NULL;
2759
2760 if (BGP_DEBUG(zebra, ZEBRA)) {
2761 if (inst_type == BGP_INSTANCE_TYPE_DEFAULT)
2762 zlog_debug("Creating Default VRF, AS %u", *as);
2763 else
2764 zlog_debug("Creating %s %s, AS %u",
2765 (inst_type == BGP_INSTANCE_TYPE_VRF)
2766 ? "VRF"
2767 : "VIEW",
2768 name, *as);
2769 }
2770
2771 bgp_lock(bgp);
2772 bgp->heuristic_coalesce = true;
2773 bgp->inst_type = inst_type;
2774 bgp->vrf_id = (inst_type == BGP_INSTANCE_TYPE_DEFAULT) ? VRF_DEFAULT
2775 : VRF_UNKNOWN;
2776 bgp->peer_self = peer_new(bgp);
2777 if (bgp->peer_self->host)
2778 XFREE(MTYPE_BGP_PEER_HOST, bgp->peer_self->host);
2779 bgp->peer_self->host =
2780 XSTRDUP(MTYPE_BGP_PEER_HOST, "Static announcement");
2781 if (bgp->peer_self->hostname != NULL) {
2782 XFREE(MTYPE_BGP_PEER_HOST, bgp->peer_self->hostname);
2783 bgp->peer_self->hostname = NULL;
2784 }
2785 if (cmd_hostname_get())
2786 bgp->peer_self->hostname =
2787 XSTRDUP(MTYPE_BGP_PEER_HOST, cmd_hostname_get());
2788
2789 if (bgp->peer_self->domainname != NULL) {
2790 XFREE(MTYPE_BGP_PEER_HOST, bgp->peer_self->domainname);
2791 bgp->peer_self->domainname = NULL;
2792 }
2793 if (cmd_domainname_get())
2794 bgp->peer_self->domainname =
2795 XSTRDUP(MTYPE_BGP_PEER_HOST, cmd_domainname_get());
2796 bgp->peer = list_new();
2797 bgp->peer->cmp = (int (*)(void *, void *))peer_cmp;
2798 bgp->peerhash = hash_create(peer_hash_key_make, peer_hash_same,
2799 "BGP Peer Hash");
2800 bgp->peerhash->max_size = BGP_PEER_MAX_HASH_SIZE;
2801
2802 bgp->group = list_new();
2803 bgp->group->cmp = (int (*)(void *, void *))peer_group_cmp;
2804
2805 FOREACH_AFI_SAFI (afi, safi) {
2806 bgp->route[afi][safi] = bgp_table_init(bgp, afi, safi);
2807 bgp->aggregate[afi][safi] = bgp_table_init(bgp, afi, safi);
2808 bgp->rib[afi][safi] = bgp_table_init(bgp, afi, safi);
2809
2810 /* Enable maximum-paths */
2811 bgp_maximum_paths_set(bgp, afi, safi, BGP_PEER_EBGP,
2812 multipath_num, 0);
2813 bgp_maximum_paths_set(bgp, afi, safi, BGP_PEER_IBGP,
2814 multipath_num, 0);
2815 }
2816
2817 bgp->v_update_delay = BGP_UPDATE_DELAY_DEF;
2818 bgp->default_local_pref = BGP_DEFAULT_LOCAL_PREF;
2819 bgp->default_subgroup_pkt_queue_max =
2820 BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX;
2821 bgp->default_holdtime = BGP_DEFAULT_HOLDTIME;
2822 bgp->default_keepalive = BGP_DEFAULT_KEEPALIVE;
2823 bgp->restart_time = BGP_DEFAULT_RESTART_TIME;
2824 bgp->stalepath_time = BGP_DEFAULT_STALEPATH_TIME;
2825 bgp->dynamic_neighbors_limit = BGP_DYNAMIC_NEIGHBORS_LIMIT_DEFAULT;
2826 bgp->dynamic_neighbors_count = 0;
2827 #if DFLT_BGP_IMPORT_CHECK
2828 bgp_flag_set(bgp, BGP_FLAG_IMPORT_CHECK);
2829 #endif
2830 #if DFLT_BGP_SHOW_HOSTNAME
2831 bgp_flag_set(bgp, BGP_FLAG_SHOW_HOSTNAME);
2832 #endif
2833 #if DFLT_BGP_LOG_NEIGHBOR_CHANGES
2834 bgp_flag_set(bgp, BGP_FLAG_LOG_NEIGHBOR_CHANGES);
2835 #endif
2836 #if DFLT_BGP_DETERMINISTIC_MED
2837 bgp_flag_set(bgp, BGP_FLAG_DETERMINISTIC_MED);
2838 #endif
2839 bgp->addpath_tx_id = BGP_ADDPATH_TX_ID_FOR_DEFAULT_ORIGINATE;
2840
2841 bgp->as = *as;
2842
2843 #if ENABLE_BGP_VNC
2844 if (inst_type != BGP_INSTANCE_TYPE_VRF) {
2845 bgp->rfapi = bgp_rfapi_new(bgp);
2846 assert(bgp->rfapi);
2847 assert(bgp->rfapi_cfg);
2848 }
2849 #endif /* ENABLE_BGP_VNC */
2850
2851 for (afi = AFI_IP; afi < AFI_MAX; afi++) {
2852 bgp->vpn_policy[afi].bgp = bgp;
2853 bgp->vpn_policy[afi].afi = afi;
2854 bgp->vpn_policy[afi].tovpn_label = MPLS_LABEL_NONE;
2855 bgp->vpn_policy[afi].tovpn_zebra_vrf_label_last_sent =
2856 MPLS_LABEL_NONE;
2857
2858 bgp->vpn_policy[afi].import_vrf = list_new();
2859 bgp->vpn_policy[afi].import_vrf->del =
2860 bgp_vrf_string_name_delete;
2861 bgp->vpn_policy[afi].export_vrf = list_new();
2862 bgp->vpn_policy[afi].export_vrf->del =
2863 bgp_vrf_string_name_delete;
2864 }
2865 if (name) {
2866 bgp->name = XSTRDUP(MTYPE_BGP, name);
2867 } else {
2868 /* TODO - The startup timer needs to be run for the whole of BGP
2869 */
2870 thread_add_timer(bm->master, bgp_startup_timer_expire, bgp,
2871 bgp->restart_time, &bgp->t_startup);
2872 }
2873
2874 /* printable name we can use in debug messages */
2875 if (inst_type == BGP_INSTANCE_TYPE_DEFAULT) {
2876 bgp->name_pretty = XSTRDUP(MTYPE_BGP, "VRF default");
2877 } else {
2878 const char *n;
2879 int len;
2880
2881 if (bgp->name)
2882 n = bgp->name;
2883 else
2884 n = "?";
2885
2886 len = 4 + 1 + strlen(n) + 1; /* "view foo\0" */
2887
2888 bgp->name_pretty = XCALLOC(MTYPE_BGP, len);
2889 snprintf(bgp->name_pretty, len, "%s %s",
2890 (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
2891 ? "VRF"
2892 : "VIEW",
2893 n);
2894 }
2895
2896 atomic_store_explicit(&bgp->wpkt_quanta, BGP_WRITE_PACKET_MAX,
2897 memory_order_relaxed);
2898 atomic_store_explicit(&bgp->rpkt_quanta, BGP_READ_PACKET_MAX,
2899 memory_order_relaxed);
2900 bgp->coalesce_time = BGP_DEFAULT_SUBGROUP_COALESCE_TIME;
2901
2902 QOBJ_REG(bgp, bgp);
2903
2904 update_bgp_group_init(bgp);
2905
2906 /* assign a unique rd id for auto derivation of vrf's RD */
2907 bf_assign_index(bm->rd_idspace, bgp->vrf_rd_id);
2908
2909 bgp_evpn_init(bgp);
2910 bgp_pbr_init(bgp);
2911 return bgp;
2912 }
2913
2914 /* Return the "default VRF" instance of BGP. */
2915 struct bgp *bgp_get_default(void)
2916 {
2917 struct bgp *bgp;
2918 struct listnode *node, *nnode;
2919
2920 for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp))
2921 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
2922 return bgp;
2923 return NULL;
2924 }
2925
2926 /* Lookup BGP entry. */
2927 struct bgp *bgp_lookup(as_t as, const char *name)
2928 {
2929 struct bgp *bgp;
2930 struct listnode *node, *nnode;
2931
2932 for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp))
2933 if (bgp->as == as
2934 && ((bgp->name == NULL && name == NULL)
2935 || (bgp->name && name && strcmp(bgp->name, name) == 0)))
2936 return bgp;
2937 return NULL;
2938 }
2939
2940 /* Lookup BGP structure by view name. */
2941 struct bgp *bgp_lookup_by_name(const char *name)
2942 {
2943 struct bgp *bgp;
2944 struct listnode *node, *nnode;
2945
2946 for (ALL_LIST_ELEMENTS(bm->bgp, node, nnode, bgp))
2947 if ((bgp->name == NULL && name == NULL)
2948 || (bgp->name && name && strcmp(bgp->name, name) == 0))
2949 return bgp;
2950 return NULL;
2951 }
2952
2953 /* Lookup BGP instance based on VRF id. */
2954 /* Note: Only to be used for incoming messages from Zebra. */
2955 struct bgp *bgp_lookup_by_vrf_id(vrf_id_t vrf_id)
2956 {
2957 struct vrf *vrf;
2958
2959 /* Lookup VRF (in tree) and follow link. */
2960 vrf = vrf_lookup_by_id(vrf_id);
2961 if (!vrf)
2962 return NULL;
2963 return (vrf->info) ? (struct bgp *)vrf->info : NULL;
2964 }
2965
2966 /* handle socket creation or deletion, if necessary
2967 * this is called for all new BGP instances
2968 */
2969 int bgp_handle_socket(struct bgp *bgp, struct vrf *vrf, vrf_id_t old_vrf_id,
2970 bool create)
2971 {
2972 int ret = 0;
2973
2974 /* Create BGP server socket, if listen mode not disabled */
2975 if (!bgp || bgp_option_check(BGP_OPT_NO_LISTEN))
2976 return 0;
2977 if (bgp->inst_type == BGP_INSTANCE_TYPE_VRF) {
2978 /*
2979 * suppress vrf socket
2980 */
2981 if (create == FALSE) {
2982 bgp_close_vrf_socket(bgp);
2983 return 0;
2984 }
2985 if (vrf == NULL)
2986 return BGP_ERR_INVALID_VALUE;
2987 /* do nothing
2988 * if vrf_id did not change
2989 */
2990 if (vrf->vrf_id == old_vrf_id)
2991 return 0;
2992 if (old_vrf_id != VRF_UNKNOWN) {
2993 /* look for old socket. close it. */
2994 bgp_close_vrf_socket(bgp);
2995 }
2996 /* if backend is not yet identified ( VRF_UNKNOWN) then
2997 * creation will be done later
2998 */
2999 if (vrf->vrf_id == VRF_UNKNOWN)
3000 return 0;
3001 ret = bgp_socket(bgp, bm->port, bm->address);
3002 if (ret < 0)
3003 return BGP_ERR_INVALID_VALUE;
3004 return 0;
3005 } else
3006 return bgp_check_main_socket(create, bgp);
3007 }
3008
3009 /* Called from VTY commands. */
3010 int bgp_get(struct bgp **bgp_val, as_t *as, const char *name,
3011 enum bgp_instance_type inst_type)
3012 {
3013 struct bgp *bgp;
3014 struct vrf *vrf = NULL;
3015
3016 /* Multiple instance check. */
3017 if (bgp_option_check(BGP_OPT_MULTIPLE_INSTANCE)) {
3018 if (name)
3019 bgp = bgp_lookup_by_name(name);
3020 else
3021 bgp = bgp_get_default();
3022
3023 /* Already exists. */
3024 if (bgp) {
3025 if (bgp->as != *as) {
3026 *as = bgp->as;
3027 return BGP_ERR_INSTANCE_MISMATCH;
3028 }
3029 if (bgp->inst_type != inst_type)
3030 return BGP_ERR_INSTANCE_MISMATCH;
3031 *bgp_val = bgp;
3032 return 0;
3033 }
3034 } else {
3035 /* BGP instance name can not be specified for single instance.
3036 */
3037 if (name)
3038 return BGP_ERR_MULTIPLE_INSTANCE_NOT_SET;
3039
3040 /* Get default BGP structure if exists. */
3041 bgp = bgp_get_default();
3042
3043 if (bgp) {
3044 if (bgp->as != *as) {
3045 *as = bgp->as;
3046 return BGP_ERR_AS_MISMATCH;
3047 }
3048 *bgp_val = bgp;
3049 return 0;
3050 }
3051 }
3052
3053 bgp = bgp_create(as, name, inst_type);
3054 bgp_router_id_set(bgp, &bgp->router_id_zebra);
3055 bgp_address_init(bgp);
3056 bgp_tip_hash_init(bgp);
3057 bgp_scan_init(bgp);
3058 *bgp_val = bgp;
3059
3060 bgp->t_rmap_def_originate_eval = NULL;
3061
3062 /* If Default instance or VRF, link to the VRF structure, if present. */
3063 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT
3064 || bgp->inst_type == BGP_INSTANCE_TYPE_VRF) {
3065 vrf = bgp_vrf_lookup_by_instance_type(bgp);
3066 if (vrf)
3067 bgp_vrf_link(bgp, vrf);
3068 }
3069 /* BGP server socket already processed if BGP instance
3070 * already part of the list
3071 */
3072 bgp_handle_socket(bgp, vrf, VRF_UNKNOWN, true);
3073 listnode_add(bm->bgp, bgp);
3074
3075 if (IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) {
3076 if (BGP_DEBUG(zebra, ZEBRA))
3077 zlog_debug("%s: Registering BGP instance %s to zebra",
3078 __PRETTY_FUNCTION__, name);
3079 bgp_zebra_instance_register(bgp);
3080 }
3081
3082 return 0;
3083 }
3084
3085 /*
3086 * Make BGP instance "up". Applies only to VRFs (non-default) and
3087 * implies the VRF has been learnt from Zebra.
3088 */
3089 void bgp_instance_up(struct bgp *bgp)
3090 {
3091 struct peer *peer;
3092 struct listnode *node, *next;
3093
3094 /* Register with zebra. */
3095 bgp_zebra_instance_register(bgp);
3096
3097 /* Kick off any peers that may have been configured. */
3098 for (ALL_LIST_ELEMENTS(bgp->peer, node, next, peer)) {
3099 if (!BGP_PEER_START_SUPPRESSED(peer))
3100 BGP_EVENT_ADD(peer, BGP_Start);
3101 }
3102
3103 /* Process any networks that have been configured. */
3104 bgp_static_add(bgp);
3105 }
3106
3107 /*
3108 * Make BGP instance "down". Applies only to VRFs (non-default) and
3109 * implies the VRF has been deleted by Zebra.
3110 */
3111 void bgp_instance_down(struct bgp *bgp)
3112 {
3113 struct peer *peer;
3114 struct listnode *node;
3115 struct listnode *next;
3116
3117 /* Stop timers. */
3118 if (bgp->t_rmap_def_originate_eval) {
3119 BGP_TIMER_OFF(bgp->t_rmap_def_originate_eval);
3120 bgp_unlock(bgp); /* TODO - This timer is started with a lock -
3121 why? */
3122 }
3123
3124 /* Bring down peers, so corresponding routes are purged. */
3125 for (ALL_LIST_ELEMENTS(bgp->peer, node, next, peer)) {
3126 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
3127 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
3128 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN);
3129 else
3130 bgp_session_reset(peer);
3131 }
3132
3133 /* Purge network and redistributed routes. */
3134 bgp_purge_static_redist_routes(bgp);
3135
3136 /* Cleanup registered nexthops (flags) */
3137 bgp_cleanup_nexthops(bgp);
3138 }
3139
3140 /* Delete BGP instance. */
3141 int bgp_delete(struct bgp *bgp)
3142 {
3143 struct peer *peer;
3144 struct peer_group *group;
3145 struct listnode *node, *next;
3146 struct vrf *vrf;
3147 afi_t afi;
3148 int i;
3149
3150 assert(bgp);
3151 THREAD_OFF(bgp->t_startup);
3152 THREAD_OFF(bgp->t_maxmed_onstartup);
3153 THREAD_OFF(bgp->t_update_delay);
3154 THREAD_OFF(bgp->t_establish_wait);
3155
3156 if (BGP_DEBUG(zebra, ZEBRA)) {
3157 if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT)
3158 zlog_debug("Deleting Default VRF");
3159 else
3160 zlog_debug("Deleting %s %s",
3161 (bgp->inst_type == BGP_INSTANCE_TYPE_VRF)
3162 ? "VRF"
3163 : "VIEW",
3164 bgp->name);
3165 }
3166
3167 /* unmap from RT list */
3168 bgp_evpn_vrf_delete(bgp);
3169
3170 /* Stop timers. */
3171 if (bgp->t_rmap_def_originate_eval) {
3172 BGP_TIMER_OFF(bgp->t_rmap_def_originate_eval);
3173 bgp_unlock(bgp); /* TODO - This timer is started with a lock -
3174 why? */
3175 }
3176
3177 /* Inform peers we're going down. */
3178 for (ALL_LIST_ELEMENTS(bgp->peer, node, next, peer)) {
3179 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
3180 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
3181 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN);
3182 }
3183
3184 /* Delete static routes (networks). */
3185 bgp_static_delete(bgp);
3186
3187 /* Unset redistribution. */
3188 for (afi = AFI_IP; afi < AFI_MAX; afi++)
3189 for (i = 0; i < ZEBRA_ROUTE_MAX; i++)
3190 if (i != ZEBRA_ROUTE_BGP)
3191 bgp_redistribute_unset(bgp, afi, i, 0);
3192
3193 /* Free peers and peer-groups. */
3194 for (ALL_LIST_ELEMENTS(bgp->group, node, next, group))
3195 peer_group_delete(group);
3196
3197 for (ALL_LIST_ELEMENTS(bgp->peer, node, next, peer))
3198 peer_delete(peer);
3199
3200 if (bgp->peer_self) {
3201 peer_delete(bgp->peer_self);
3202 bgp->peer_self = NULL;
3203 }
3204
3205 update_bgp_group_free(bgp);
3206
3207 /* TODO - Other memory may need to be freed - e.g., NHT */
3208
3209 #if ENABLE_BGP_VNC
3210 rfapi_delete(bgp);
3211 #endif
3212 bgp_cleanup_routes(bgp);
3213
3214 for (afi = 0; afi < AFI_MAX; ++afi) {
3215 if (!bgp->vpn_policy[afi].import_redirect_rtlist)
3216 continue;
3217 ecommunity_free(
3218 &bgp->vpn_policy[afi]
3219 .import_redirect_rtlist);
3220 bgp->vpn_policy[afi].import_redirect_rtlist = NULL;
3221 }
3222
3223 /* Deregister from Zebra, if needed */
3224 if (IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) {
3225 if (BGP_DEBUG(zebra, ZEBRA))
3226 zlog_debug("%s: deregistering this bgp %s instance from zebra",
3227 __PRETTY_FUNCTION__, bgp->name);
3228 bgp_zebra_instance_deregister(bgp);
3229 }
3230
3231 /* Remove visibility via the master list - there may however still be
3232 * routes to be processed still referencing the struct bgp.
3233 */
3234 listnode_delete(bm->bgp, bgp);
3235
3236 /* Free interfaces in this instance. */
3237 bgp_if_finish(bgp);
3238
3239 vrf = bgp_vrf_lookup_by_instance_type(bgp);
3240 bgp_handle_socket(bgp, vrf, VRF_UNKNOWN, false);
3241 if (vrf)
3242 bgp_vrf_unlink(bgp, vrf);
3243
3244 thread_master_free_unused(bm->master);
3245 bgp_unlock(bgp); /* initial reference */
3246
3247 return 0;
3248 }
3249
3250 void bgp_free(struct bgp *bgp)
3251 {
3252 afi_t afi;
3253 safi_t safi;
3254 struct bgp_table *table;
3255 struct bgp_node *rn;
3256 struct bgp_rmap *rmap;
3257
3258 QOBJ_UNREG(bgp);
3259
3260 list_delete(&bgp->group);
3261 list_delete(&bgp->peer);
3262
3263 if (bgp->peerhash) {
3264 hash_free(bgp->peerhash);
3265 bgp->peerhash = NULL;
3266 }
3267
3268 FOREACH_AFI_SAFI (afi, safi) {
3269 /* Special handling for 2-level routing tables. */
3270 if (safi == SAFI_MPLS_VPN || safi == SAFI_ENCAP
3271 || safi == SAFI_EVPN) {
3272 for (rn = bgp_table_top(bgp->rib[afi][safi]); rn;
3273 rn = bgp_route_next(rn)) {
3274 table = (struct bgp_table *)rn->info;
3275 bgp_table_finish(&table);
3276 }
3277 }
3278 if (bgp->route[afi][safi])
3279 bgp_table_finish(&bgp->route[afi][safi]);
3280 if (bgp->aggregate[afi][safi])
3281 bgp_table_finish(&bgp->aggregate[afi][safi]);
3282 if (bgp->rib[afi][safi])
3283 bgp_table_finish(&bgp->rib[afi][safi]);
3284 rmap = &bgp->table_map[afi][safi];
3285 if (rmap->name)
3286 XFREE(MTYPE_ROUTE_MAP_NAME, rmap->name);
3287 }
3288
3289 bgp_scan_finish(bgp);
3290 bgp_address_destroy(bgp);
3291 bgp_tip_hash_destroy(bgp);
3292
3293 /* release the auto RD id */
3294 bf_release_index(bm->rd_idspace, bgp->vrf_rd_id);
3295
3296 bgp_evpn_cleanup(bgp);
3297 bgp_pbr_cleanup(bgp);
3298
3299 for (afi = AFI_IP; afi < AFI_MAX; afi++) {
3300 vpn_policy_direction_t dir;
3301
3302 if (bgp->vpn_policy[afi].import_vrf)
3303 list_delete(&bgp->vpn_policy[afi].import_vrf);
3304 if (bgp->vpn_policy[afi].export_vrf)
3305 list_delete(&bgp->vpn_policy[afi].export_vrf);
3306
3307 dir = BGP_VPN_POLICY_DIR_FROMVPN;
3308 if (bgp->vpn_policy[afi].rtlist[dir])
3309 ecommunity_free(&bgp->vpn_policy[afi].rtlist[dir]);
3310 dir = BGP_VPN_POLICY_DIR_TOVPN;
3311 if (bgp->vpn_policy[afi].rtlist[dir])
3312 ecommunity_free(&bgp->vpn_policy[afi].rtlist[dir]);
3313 }
3314
3315 if (bgp->name)
3316 XFREE(MTYPE_BGP, bgp->name);
3317 if (bgp->name_pretty)
3318 XFREE(MTYPE_BGP, bgp->name_pretty);
3319
3320 XFREE(MTYPE_BGP, bgp);
3321 }
3322
3323 struct peer *peer_lookup_by_conf_if(struct bgp *bgp, const char *conf_if)
3324 {
3325 struct peer *peer;
3326 struct listnode *node, *nnode;
3327
3328 if (!conf_if)
3329 return NULL;
3330
3331 if (bgp != NULL) {
3332 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
3333 if (peer->conf_if && !strcmp(peer->conf_if, conf_if)
3334 && !CHECK_FLAG(peer->sflags,
3335 PEER_STATUS_ACCEPT_PEER))
3336 return peer;
3337 } else if (bm->bgp != NULL) {
3338 struct listnode *bgpnode, *nbgpnode;
3339
3340 for (ALL_LIST_ELEMENTS(bm->bgp, bgpnode, nbgpnode, bgp))
3341 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
3342 if (peer->conf_if
3343 && !strcmp(peer->conf_if, conf_if)
3344 && !CHECK_FLAG(peer->sflags,
3345 PEER_STATUS_ACCEPT_PEER))
3346 return peer;
3347 }
3348 return NULL;
3349 }
3350
3351 struct peer *peer_lookup_by_hostname(struct bgp *bgp, const char *hostname)
3352 {
3353 struct peer *peer;
3354 struct listnode *node, *nnode;
3355
3356 if (!hostname)
3357 return NULL;
3358
3359 if (bgp != NULL) {
3360 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
3361 if (peer->hostname && !strcmp(peer->hostname, hostname)
3362 && !CHECK_FLAG(peer->sflags,
3363 PEER_STATUS_ACCEPT_PEER))
3364 return peer;
3365 } else if (bm->bgp != NULL) {
3366 struct listnode *bgpnode, *nbgpnode;
3367
3368 for (ALL_LIST_ELEMENTS(bm->bgp, bgpnode, nbgpnode, bgp))
3369 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
3370 if (peer->hostname
3371 && !strcmp(peer->hostname, hostname)
3372 && !CHECK_FLAG(peer->sflags,
3373 PEER_STATUS_ACCEPT_PEER))
3374 return peer;
3375 }
3376 return NULL;
3377 }
3378
3379 struct peer *peer_lookup(struct bgp *bgp, union sockunion *su)
3380 {
3381 struct peer *peer = NULL;
3382 struct peer tmp_peer;
3383
3384 memset(&tmp_peer, 0, sizeof(struct peer));
3385
3386 /*
3387 * We do not want to find the doppelganger peer so search for the peer
3388 * in
3389 * the hash that has PEER_FLAG_CONFIG_NODE
3390 */
3391 SET_FLAG(tmp_peer.flags, PEER_FLAG_CONFIG_NODE);
3392
3393 tmp_peer.su = *su;
3394
3395 if (bgp != NULL) {
3396 peer = hash_lookup(bgp->peerhash, &tmp_peer);
3397 } else if (bm->bgp != NULL) {
3398 struct listnode *bgpnode, *nbgpnode;
3399
3400 for (ALL_LIST_ELEMENTS(bm->bgp, bgpnode, nbgpnode, bgp)) {
3401 peer = hash_lookup(bgp->peerhash, &tmp_peer);
3402 if (peer)
3403 break;
3404 }
3405 }
3406
3407 return peer;
3408 }
3409
3410 struct peer *peer_create_bind_dynamic_neighbor(struct bgp *bgp,
3411 union sockunion *su,
3412 struct peer_group *group)
3413 {
3414 struct peer *peer;
3415 afi_t afi;
3416 safi_t safi;
3417
3418 /* Create peer first; we've already checked group config is valid. */
3419 peer = peer_create(su, NULL, bgp, bgp->as, group->conf->as,
3420 group->conf->as_type, 0, 0, group);
3421 if (!peer)
3422 return NULL;
3423
3424 /* Link to group */
3425 peer = peer_lock(peer);
3426 listnode_add(group->peer, peer);
3427
3428 peer_group2peer_config_copy(group, peer);
3429
3430 /*
3431 * Bind peer for all AFs configured for the group. We don't call
3432 * peer_group_bind as that is sub-optimal and does some stuff we don't
3433 * want.
3434 */
3435 FOREACH_AFI_SAFI (afi, safi) {
3436 if (!group->conf->afc[afi][safi])
3437 continue;
3438 peer->afc[afi][safi] = 1;
3439
3440 if (!peer_af_find(peer, afi, safi))
3441 peer_af_create(peer, afi, safi);
3442
3443 peer_group2peer_config_copy_af(group, peer, afi, safi);
3444 }
3445
3446 /* Mark as dynamic, but also as a "config node" for other things to
3447 * work. */
3448 SET_FLAG(peer->flags, PEER_FLAG_DYNAMIC_NEIGHBOR);
3449 SET_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE);
3450
3451 return peer;
3452 }
3453
3454 struct prefix *
3455 peer_group_lookup_dynamic_neighbor_range(struct peer_group *group,
3456 struct prefix *prefix)
3457 {
3458 struct listnode *node, *nnode;
3459 struct prefix *range;
3460 afi_t afi;
3461
3462 afi = family2afi(prefix->family);
3463
3464 if (group->listen_range[afi])
3465 for (ALL_LIST_ELEMENTS(group->listen_range[afi], node, nnode,
3466 range))
3467 if (prefix_match(range, prefix))
3468 return range;
3469
3470 return NULL;
3471 }
3472
3473 struct peer_group *
3474 peer_group_lookup_dynamic_neighbor(struct bgp *bgp, struct prefix *prefix,
3475 struct prefix **listen_range)
3476 {
3477 struct prefix *range = NULL;
3478 struct peer_group *group = NULL;
3479 struct listnode *node, *nnode;
3480
3481 *listen_range = NULL;
3482 if (bgp != NULL) {
3483 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group))
3484 if ((range = peer_group_lookup_dynamic_neighbor_range(
3485 group, prefix)))
3486 break;
3487 } else if (bm->bgp != NULL) {
3488 struct listnode *bgpnode, *nbgpnode;
3489
3490 for (ALL_LIST_ELEMENTS(bm->bgp, bgpnode, nbgpnode, bgp))
3491 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group))
3492 if ((range = peer_group_lookup_dynamic_neighbor_range(
3493 group, prefix)))
3494 goto found_range;
3495 }
3496
3497 found_range:
3498 *listen_range = range;
3499 return (group && range) ? group : NULL;
3500 }
3501
3502 struct peer *peer_lookup_dynamic_neighbor(struct bgp *bgp, union sockunion *su)
3503 {
3504 struct peer_group *group;
3505 struct bgp *gbgp;
3506 struct peer *peer;
3507 struct prefix prefix;
3508 struct prefix *listen_range;
3509 int dncount;
3510 char buf[PREFIX2STR_BUFFER];
3511 char buf1[PREFIX2STR_BUFFER];
3512
3513 sockunion2hostprefix(su, &prefix);
3514
3515 /* See if incoming connection matches a configured listen range. */
3516 group = peer_group_lookup_dynamic_neighbor(bgp, &prefix, &listen_range);
3517
3518 if (!group)
3519 return NULL;
3520
3521
3522 gbgp = group->bgp;
3523
3524 if (!gbgp)
3525 return NULL;
3526
3527 prefix2str(&prefix, buf, sizeof(buf));
3528 prefix2str(listen_range, buf1, sizeof(buf1));
3529
3530 if (bgp_debug_neighbor_events(NULL))
3531 zlog_debug(
3532 "Dynamic Neighbor %s matches group %s listen range %s",
3533 buf, group->name, buf1);
3534
3535 /* Are we within the listen limit? */
3536 dncount = gbgp->dynamic_neighbors_count;
3537
3538 if (dncount >= gbgp->dynamic_neighbors_limit) {
3539 if (bgp_debug_neighbor_events(NULL))
3540 zlog_debug("Dynamic Neighbor %s rejected - at limit %d",
3541 inet_sutop(su, buf),
3542 gbgp->dynamic_neighbors_limit);
3543 return NULL;
3544 }
3545
3546 /* Ensure group is not disabled. */
3547 if (CHECK_FLAG(group->conf->flags, PEER_FLAG_SHUTDOWN)) {
3548 if (bgp_debug_neighbor_events(NULL))
3549 zlog_debug(
3550 "Dynamic Neighbor %s rejected - group %s disabled",
3551 buf, group->name);
3552 return NULL;
3553 }
3554
3555 /* Check that at least one AF is activated for the group. */
3556 if (!peer_group_af_configured(group)) {
3557 if (bgp_debug_neighbor_events(NULL))
3558 zlog_debug(
3559 "Dynamic Neighbor %s rejected - no AF activated for group %s",
3560 buf, group->name);
3561 return NULL;
3562 }
3563
3564 /* Create dynamic peer and bind to associated group. */
3565 peer = peer_create_bind_dynamic_neighbor(gbgp, su, group);
3566 assert(peer);
3567
3568 gbgp->dynamic_neighbors_count = ++dncount;
3569
3570 if (bgp_debug_neighbor_events(peer))
3571 zlog_debug("%s Dynamic Neighbor added, group %s count %d",
3572 peer->host, group->name, dncount);
3573
3574 return peer;
3575 }
3576
3577 static void peer_drop_dynamic_neighbor(struct peer *peer)
3578 {
3579 int dncount = -1;
3580 if (peer->group->bgp) {
3581 dncount = peer->group->bgp->dynamic_neighbors_count;
3582 if (dncount)
3583 peer->group->bgp->dynamic_neighbors_count = --dncount;
3584 }
3585 if (bgp_debug_neighbor_events(peer))
3586 zlog_debug("%s dropped from group %s, count %d", peer->host,
3587 peer->group->name, dncount);
3588 }
3589
3590 /* If peer is configured at least one address family return 1. */
3591 int peer_active(struct peer *peer)
3592 {
3593 if (BGP_PEER_SU_UNSPEC(peer))
3594 return 0;
3595 if (peer->afc[AFI_IP][SAFI_UNICAST] || peer->afc[AFI_IP][SAFI_MULTICAST]
3596 || peer->afc[AFI_IP][SAFI_LABELED_UNICAST]
3597 || peer->afc[AFI_IP][SAFI_MPLS_VPN] || peer->afc[AFI_IP][SAFI_ENCAP]
3598 || peer->afc[AFI_IP][SAFI_FLOWSPEC]
3599 || peer->afc[AFI_IP6][SAFI_UNICAST]
3600 || peer->afc[AFI_IP6][SAFI_MULTICAST]
3601 || peer->afc[AFI_IP6][SAFI_LABELED_UNICAST]
3602 || peer->afc[AFI_IP6][SAFI_MPLS_VPN]
3603 || peer->afc[AFI_IP6][SAFI_ENCAP]
3604 || peer->afc[AFI_IP6][SAFI_FLOWSPEC]
3605 || peer->afc[AFI_L2VPN][SAFI_EVPN])
3606 return 1;
3607 return 0;
3608 }
3609
3610 /* If peer is negotiated at least one address family return 1. */
3611 int peer_active_nego(struct peer *peer)
3612 {
3613 if (peer->afc_nego[AFI_IP][SAFI_UNICAST]
3614 || peer->afc_nego[AFI_IP][SAFI_MULTICAST]
3615 || peer->afc_nego[AFI_IP][SAFI_LABELED_UNICAST]
3616 || peer->afc_nego[AFI_IP][SAFI_MPLS_VPN]
3617 || peer->afc_nego[AFI_IP][SAFI_ENCAP]
3618 || peer->afc_nego[AFI_IP][SAFI_FLOWSPEC]
3619 || peer->afc_nego[AFI_IP6][SAFI_UNICAST]
3620 || peer->afc_nego[AFI_IP6][SAFI_MULTICAST]
3621 || peer->afc_nego[AFI_IP6][SAFI_LABELED_UNICAST]
3622 || peer->afc_nego[AFI_IP6][SAFI_MPLS_VPN]
3623 || peer->afc_nego[AFI_IP6][SAFI_ENCAP]
3624 || peer->afc_nego[AFI_IP6][SAFI_FLOWSPEC]
3625 || peer->afc_nego[AFI_L2VPN][SAFI_EVPN])
3626 return 1;
3627 return 0;
3628 }
3629
3630 /* peer_flag_change_type. */
3631 enum peer_change_type {
3632 peer_change_none,
3633 peer_change_reset,
3634 peer_change_reset_in,
3635 peer_change_reset_out,
3636 };
3637
3638 static void peer_change_action(struct peer *peer, afi_t afi, safi_t safi,
3639 enum peer_change_type type)
3640 {
3641 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
3642 return;
3643
3644 if (peer->status != Established)
3645 return;
3646
3647 if (type == peer_change_reset) {
3648 /* If we're resetting session, we've to delete both peer struct
3649 */
3650 if ((peer->doppelganger)
3651 && (peer->doppelganger->status != Deleted)
3652 && (!CHECK_FLAG(peer->doppelganger->flags,
3653 PEER_FLAG_CONFIG_NODE)))
3654 peer_delete(peer->doppelganger);
3655
3656 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
3657 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
3658 } else if (type == peer_change_reset_in) {
3659 if (CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV)
3660 || CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV))
3661 bgp_route_refresh_send(peer, afi, safi, 0, 0, 0);
3662 else {
3663 if ((peer->doppelganger)
3664 && (peer->doppelganger->status != Deleted)
3665 && (!CHECK_FLAG(peer->doppelganger->flags,
3666 PEER_FLAG_CONFIG_NODE)))
3667 peer_delete(peer->doppelganger);
3668
3669 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
3670 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
3671 }
3672 } else if (type == peer_change_reset_out) {
3673 update_group_adjust_peer(peer_af_find(peer, afi, safi));
3674 bgp_announce_route(peer, afi, safi);
3675 }
3676 }
3677
3678 struct peer_flag_action {
3679 /* Peer's flag. */
3680 uint32_t flag;
3681
3682 /* This flag can be set for peer-group member. */
3683 uint8_t not_for_member;
3684
3685 /* Action when the flag is changed. */
3686 enum peer_change_type type;
3687 };
3688
3689 static const struct peer_flag_action peer_flag_action_list[] = {
3690 {PEER_FLAG_PASSIVE, 0, peer_change_reset},
3691 {PEER_FLAG_SHUTDOWN, 0, peer_change_reset},
3692 {PEER_FLAG_DONT_CAPABILITY, 0, peer_change_none},
3693 {PEER_FLAG_OVERRIDE_CAPABILITY, 0, peer_change_none},
3694 {PEER_FLAG_STRICT_CAP_MATCH, 0, peer_change_none},
3695 {PEER_FLAG_DYNAMIC_CAPABILITY, 0, peer_change_reset},
3696 {PEER_FLAG_DISABLE_CONNECTED_CHECK, 0, peer_change_reset},
3697 {PEER_FLAG_CAPABILITY_ENHE, 0, peer_change_reset},
3698 {PEER_FLAG_ENFORCE_FIRST_AS, 0, peer_change_reset_in},
3699 {PEER_FLAG_ROUTEADV, 0, peer_change_none},
3700 {PEER_FLAG_TIMER, 0, peer_change_none},
3701 {PEER_FLAG_TIMER_CONNECT, 0, peer_change_none},
3702 {PEER_FLAG_PASSWORD, 0, peer_change_none},
3703 {PEER_FLAG_LOCAL_AS, 0, peer_change_none},
3704 {PEER_FLAG_LOCAL_AS_NO_PREPEND, 0, peer_change_none},
3705 {PEER_FLAG_LOCAL_AS_REPLACE_AS, 0, peer_change_none},
3706 {PEER_FLAG_UPDATE_SOURCE, 0, peer_change_none},
3707 {0, 0, 0}};
3708
3709 static const struct peer_flag_action peer_af_flag_action_list[] = {
3710 {PEER_FLAG_SEND_COMMUNITY, 1, peer_change_reset_out},
3711 {PEER_FLAG_SEND_EXT_COMMUNITY, 1, peer_change_reset_out},
3712 {PEER_FLAG_SEND_LARGE_COMMUNITY, 1, peer_change_reset_out},
3713 {PEER_FLAG_NEXTHOP_SELF, 1, peer_change_reset_out},
3714 {PEER_FLAG_REFLECTOR_CLIENT, 1, peer_change_reset},
3715 {PEER_FLAG_RSERVER_CLIENT, 1, peer_change_reset},
3716 {PEER_FLAG_SOFT_RECONFIG, 0, peer_change_reset_in},
3717 {PEER_FLAG_AS_PATH_UNCHANGED, 1, peer_change_reset_out},
3718 {PEER_FLAG_NEXTHOP_UNCHANGED, 1, peer_change_reset_out},
3719 {PEER_FLAG_MED_UNCHANGED, 1, peer_change_reset_out},
3720 {PEER_FLAG_DEFAULT_ORIGINATE, 0, peer_change_none},
3721 {PEER_FLAG_REMOVE_PRIVATE_AS, 1, peer_change_reset_out},
3722 {PEER_FLAG_ALLOWAS_IN, 0, peer_change_reset_in},
3723 {PEER_FLAG_ALLOWAS_IN_ORIGIN, 0, peer_change_reset_in},
3724 {PEER_FLAG_ORF_PREFIX_SM, 1, peer_change_reset},
3725 {PEER_FLAG_ORF_PREFIX_RM, 1, peer_change_reset},
3726 {PEER_FLAG_MAX_PREFIX, 0, peer_change_none},
3727 {PEER_FLAG_MAX_PREFIX_WARNING, 0, peer_change_none},
3728 {PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED, 0, peer_change_reset_out},
3729 {PEER_FLAG_FORCE_NEXTHOP_SELF, 1, peer_change_reset_out},
3730 {PEER_FLAG_REMOVE_PRIVATE_AS_ALL, 1, peer_change_reset_out},
3731 {PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE, 1, peer_change_reset_out},
3732 {PEER_FLAG_AS_OVERRIDE, 1, peer_change_reset_out},
3733 {PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE, 1, peer_change_reset_out},
3734 {PEER_FLAG_ADDPATH_TX_ALL_PATHS, 1, peer_change_reset},
3735 {PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS, 1, peer_change_reset},
3736 {PEER_FLAG_WEIGHT, 0, peer_change_reset_in},
3737 {0, 0, 0}};
3738
3739 /* Proper action set. */
3740 static int peer_flag_action_set(const struct peer_flag_action *action_list,
3741 int size, struct peer_flag_action *action,
3742 uint32_t flag)
3743 {
3744 int i;
3745 int found = 0;
3746 int reset_in = 0;
3747 int reset_out = 0;
3748 const struct peer_flag_action *match = NULL;
3749
3750 /* Check peer's frag action. */
3751 for (i = 0; i < size; i++) {
3752 match = &action_list[i];
3753
3754 if (match->flag == 0)
3755 break;
3756
3757 if (match->flag & flag) {
3758 found = 1;
3759
3760 if (match->type == peer_change_reset_in)
3761 reset_in = 1;
3762 if (match->type == peer_change_reset_out)
3763 reset_out = 1;
3764 if (match->type == peer_change_reset) {
3765 reset_in = 1;
3766 reset_out = 1;
3767 }
3768 if (match->not_for_member)
3769 action->not_for_member = 1;
3770 }
3771 }
3772
3773 /* Set peer clear type. */
3774 if (reset_in && reset_out)
3775 action->type = peer_change_reset;
3776 else if (reset_in)
3777 action->type = peer_change_reset_in;
3778 else if (reset_out)
3779 action->type = peer_change_reset_out;
3780 else
3781 action->type = peer_change_none;
3782
3783 return found;
3784 }
3785
3786 static void peer_flag_modify_action(struct peer *peer, uint32_t flag)
3787 {
3788 if (flag == PEER_FLAG_SHUTDOWN) {
3789 if (CHECK_FLAG(peer->flags, flag)) {
3790 if (CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT))
3791 peer_nsf_stop(peer);
3792
3793 UNSET_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW);
3794 if (peer->t_pmax_restart) {
3795 BGP_TIMER_OFF(peer->t_pmax_restart);
3796 if (bgp_debug_neighbor_events(peer))
3797 zlog_debug(
3798 "%s Maximum-prefix restart timer canceled",
3799 peer->host);
3800 }
3801
3802 if (CHECK_FLAG(peer->sflags, PEER_STATUS_NSF_WAIT))
3803 peer_nsf_stop(peer);
3804
3805 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
3806 char *msg = peer->tx_shutdown_message;
3807 size_t msglen;
3808
3809 if (!msg && peer_group_active(peer))
3810 msg = peer->group->conf
3811 ->tx_shutdown_message;
3812 msglen = msg ? strlen(msg) : 0;
3813 if (msglen > 128)
3814 msglen = 128;
3815
3816 if (msglen) {
3817 uint8_t msgbuf[129];
3818
3819 msgbuf[0] = msglen;
3820 memcpy(msgbuf + 1, msg, msglen);
3821
3822 bgp_notify_send_with_data(
3823 peer, BGP_NOTIFY_CEASE,
3824 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN,
3825 msgbuf, msglen + 1);
3826 } else
3827 bgp_notify_send(
3828 peer, BGP_NOTIFY_CEASE,
3829 BGP_NOTIFY_CEASE_ADMIN_SHUTDOWN);
3830 } else
3831 bgp_session_reset(peer);
3832 } else {
3833 peer->v_start = BGP_INIT_START_TIMER;
3834 BGP_EVENT_ADD(peer, BGP_Stop);
3835 }
3836 } else if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
3837 if (flag == PEER_FLAG_DYNAMIC_CAPABILITY)
3838 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
3839 else if (flag == PEER_FLAG_PASSIVE)
3840 peer->last_reset = PEER_DOWN_PASSIVE_CHANGE;
3841 else if (flag == PEER_FLAG_DISABLE_CONNECTED_CHECK)
3842 peer->last_reset = PEER_DOWN_MULTIHOP_CHANGE;
3843
3844 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
3845 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
3846 } else
3847 bgp_session_reset(peer);
3848 }
3849
3850 /* Change specified peer flag. */
3851 static int peer_flag_modify(struct peer *peer, uint32_t flag, int set)
3852 {
3853 int found;
3854 int size;
3855 bool invert, member_invert;
3856 struct peer *member;
3857 struct listnode *node, *nnode;
3858 struct peer_flag_action action;
3859
3860 memset(&action, 0, sizeof(struct peer_flag_action));
3861 size = sizeof peer_flag_action_list / sizeof(struct peer_flag_action);
3862
3863 invert = CHECK_FLAG(peer->flags_invert, flag);
3864 found = peer_flag_action_set(peer_flag_action_list, size, &action,
3865 flag);
3866
3867 /* Abort if no flag action exists. */
3868 if (!found)
3869 return BGP_ERR_INVALID_FLAG;
3870
3871 /* Check for flag conflict: STRICT_CAP_MATCH && OVERRIDE_CAPABILITY */
3872 if (set && CHECK_FLAG(peer->flags | flag, PEER_FLAG_STRICT_CAP_MATCH)
3873 && CHECK_FLAG(peer->flags | flag, PEER_FLAG_OVERRIDE_CAPABILITY))
3874 return BGP_ERR_PEER_FLAG_CONFLICT;
3875
3876 /* Handle flag updates where desired state matches current state. */
3877 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
3878 if (set && CHECK_FLAG(peer->flags, flag)) {
3879 COND_FLAG(peer->flags_override, flag, !invert);
3880 return 0;
3881 }
3882
3883 if (!set && !CHECK_FLAG(peer->flags, flag)) {
3884 COND_FLAG(peer->flags_override, flag, invert);
3885 return 0;
3886 }
3887 }
3888
3889 /* Inherit from peer-group or set/unset flags accordingly. */
3890 if (peer_group_active(peer) && set == invert)
3891 peer_flag_inherit(peer, flag);
3892 else
3893 COND_FLAG(peer->flags, flag, set);
3894
3895 /* Check if handling a regular peer. */
3896 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
3897 /* Update flag override state accordingly. */
3898 COND_FLAG(peer->flags_override, flag, set != invert);
3899
3900 /* Execute flag action on peer. */
3901 if (action.type == peer_change_reset)
3902 peer_flag_modify_action(peer, flag);
3903
3904 /* Skip peer-group mechanics for regular peers. */
3905 return 0;
3906 }
3907
3908 /*
3909 * Update peer-group members, unless they are explicitely overriding
3910 * peer-group configuration.
3911 */
3912 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
3913 /* Skip peers with overridden configuration. */
3914 if (CHECK_FLAG(member->flags_override, flag))
3915 continue;
3916
3917 /* Check if only member without group is inverted. */
3918 member_invert =
3919 CHECK_FLAG(member->flags_invert, flag) && !invert;
3920
3921 /* Skip peers with equivalent configuration. */
3922 if (set != member_invert && CHECK_FLAG(member->flags, flag))
3923 continue;
3924
3925 if (set == member_invert && !CHECK_FLAG(member->flags, flag))
3926 continue;
3927
3928 /* Update flag on peer-group member. */
3929 COND_FLAG(member->flags, flag, set != member_invert);
3930
3931 /* Execute flag action on peer-group member. */
3932 if (action.type == peer_change_reset)
3933 peer_flag_modify_action(member, flag);
3934 }
3935
3936 return 0;
3937 }
3938
3939 int peer_flag_set(struct peer *peer, uint32_t flag)
3940 {
3941 return peer_flag_modify(peer, flag, 1);
3942 }
3943
3944 int peer_flag_unset(struct peer *peer, uint32_t flag)
3945 {
3946 return peer_flag_modify(peer, flag, 0);
3947 }
3948
3949 static int peer_af_flag_modify(struct peer *peer, afi_t afi, safi_t safi,
3950 uint32_t flag, bool set)
3951 {
3952 int found;
3953 int size;
3954 int addpath_tx_used;
3955 bool invert, member_invert;
3956 struct bgp *bgp;
3957 struct peer *member;
3958 struct listnode *node, *nnode;
3959 struct peer_flag_action action;
3960
3961 memset(&action, 0, sizeof(struct peer_flag_action));
3962 size = sizeof peer_af_flag_action_list
3963 / sizeof(struct peer_flag_action);
3964
3965 invert = CHECK_FLAG(peer->af_flags_invert[afi][safi], flag);
3966 found = peer_flag_action_set(peer_af_flag_action_list, size, &action,
3967 flag);
3968
3969 /* Abort if flag action exists. */
3970 if (!found)
3971 return BGP_ERR_INVALID_FLAG;
3972
3973 /* Special check for reflector client. */
3974 if (flag & PEER_FLAG_REFLECTOR_CLIENT
3975 && peer_sort(peer) != BGP_PEER_IBGP)
3976 return BGP_ERR_NOT_INTERNAL_PEER;
3977
3978 /* Special check for remove-private-AS. */
3979 if (flag & PEER_FLAG_REMOVE_PRIVATE_AS
3980 && peer_sort(peer) == BGP_PEER_IBGP)
3981 return BGP_ERR_REMOVE_PRIVATE_AS;
3982
3983 /* as-override is not allowed for IBGP peers */
3984 if (flag & PEER_FLAG_AS_OVERRIDE && peer_sort(peer) == BGP_PEER_IBGP)
3985 return BGP_ERR_AS_OVERRIDE;
3986
3987 /* Handle flag updates where desired state matches current state. */
3988 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
3989 if (set && CHECK_FLAG(peer->af_flags[afi][safi], flag)) {
3990 COND_FLAG(peer->af_flags_override[afi][safi], flag,
3991 !invert);
3992 return 0;
3993 }
3994
3995 if (!set && !CHECK_FLAG(peer->af_flags[afi][safi], flag)) {
3996 COND_FLAG(peer->af_flags_override[afi][safi], flag,
3997 invert);
3998 return 0;
3999 }
4000 }
4001
4002 /*
4003 * For EVPN we implicitly set the NEXTHOP_UNCHANGED flag,
4004 * if we are setting/unsetting flags which conflict with this flag
4005 * handle accordingly
4006 */
4007 if (afi == AFI_L2VPN && safi == SAFI_EVPN) {
4008 if (set) {
4009
4010 /*
4011 * if we are setting NEXTHOP_SELF, we need to unset the
4012 * NEXTHOP_UNCHANGED flag
4013 */
4014 if (CHECK_FLAG(flag, PEER_FLAG_NEXTHOP_SELF) ||
4015 CHECK_FLAG(flag, PEER_FLAG_FORCE_NEXTHOP_SELF))
4016 UNSET_FLAG(peer->af_flags[afi][safi],
4017 PEER_FLAG_NEXTHOP_UNCHANGED);
4018 } else {
4019
4020 /*
4021 * if we are unsetting NEXTHOP_SELF, we need to set the
4022 * NEXTHOP_UNCHANGED flag to reset the defaults for EVPN
4023 */
4024 if (CHECK_FLAG(flag, PEER_FLAG_NEXTHOP_SELF) ||
4025 CHECK_FLAG(flag, PEER_FLAG_FORCE_NEXTHOP_SELF))
4026 SET_FLAG(peer->af_flags[afi][safi],
4027 PEER_FLAG_NEXTHOP_UNCHANGED);
4028 }
4029 }
4030
4031 /* Inherit from peer-group or set/unset flags accordingly. */
4032 if (peer_group_active(peer) && set == invert)
4033 peer_af_flag_inherit(peer, afi, safi, flag);
4034 else
4035 COND_FLAG(peer->af_flags[afi][safi], flag, set);
4036
4037 /* Execute action when peer is established. */
4038 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)
4039 && peer->status == Established) {
4040 if (!set && flag == PEER_FLAG_SOFT_RECONFIG)
4041 bgp_clear_adj_in(peer, afi, safi);
4042 else {
4043 if (flag == PEER_FLAG_REFLECTOR_CLIENT)
4044 peer->last_reset = PEER_DOWN_RR_CLIENT_CHANGE;
4045 else if (flag == PEER_FLAG_RSERVER_CLIENT)
4046 peer->last_reset = PEER_DOWN_RS_CLIENT_CHANGE;
4047 else if (flag == PEER_FLAG_ORF_PREFIX_SM)
4048 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4049 else if (flag == PEER_FLAG_ORF_PREFIX_RM)
4050 peer->last_reset = PEER_DOWN_CAPABILITY_CHANGE;
4051
4052 peer_change_action(peer, afi, safi, action.type);
4053 }
4054 }
4055
4056 /* Check if handling a regular peer. */
4057 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4058 COND_FLAG(peer->af_flags_override[afi][safi], flag,
4059 set != invert);
4060 } else {
4061 /*
4062 * Update peer-group members, unless they are explicitely
4063 * overriding peer-group configuration.
4064 */
4065 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode,
4066 member)) {
4067 /* Skip peers with overridden configuration. */
4068 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4069 flag))
4070 continue;
4071
4072 /* Check if only member without group is inverted. */
4073 member_invert =
4074 CHECK_FLAG(member->af_flags_invert[afi][safi],
4075 flag)
4076 && !invert;
4077
4078 /* Skip peers with equivalent configuration. */
4079 if (set != member_invert
4080 && CHECK_FLAG(member->af_flags[afi][safi], flag))
4081 continue;
4082
4083 if (set == member_invert
4084 && !CHECK_FLAG(member->af_flags[afi][safi], flag))
4085 continue;
4086
4087 /* Update flag on peer-group member. */
4088 COND_FLAG(member->af_flags[afi][safi], flag,
4089 set != member_invert);
4090
4091 /* Execute flag action on peer-group member. */
4092 if (member->status == Established) {
4093 if (!set && flag == PEER_FLAG_SOFT_RECONFIG)
4094 bgp_clear_adj_in(member, afi, safi);
4095 else {
4096 if (flag == PEER_FLAG_REFLECTOR_CLIENT)
4097 member->last_reset =
4098 PEER_DOWN_RR_CLIENT_CHANGE;
4099 else if (flag
4100 == PEER_FLAG_RSERVER_CLIENT)
4101 member->last_reset =
4102 PEER_DOWN_RS_CLIENT_CHANGE;
4103 else if (flag
4104 == PEER_FLAG_ORF_PREFIX_SM)
4105 member->last_reset =
4106 PEER_DOWN_CAPABILITY_CHANGE;
4107 else if (flag
4108 == PEER_FLAG_ORF_PREFIX_RM)
4109 member->last_reset =
4110 PEER_DOWN_CAPABILITY_CHANGE;
4111
4112 peer_change_action(member, afi, safi,
4113 action.type);
4114 }
4115 }
4116 }
4117 }
4118
4119 /* Track if addpath TX is in use */
4120 if (flag & (PEER_FLAG_ADDPATH_TX_ALL_PATHS
4121 | PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS)) {
4122 bgp = peer->bgp;
4123 addpath_tx_used = 0;
4124
4125 if (set) {
4126 addpath_tx_used = 1;
4127
4128 if (flag & PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS) {
4129 if (!bgp_flag_check(
4130 bgp, BGP_FLAG_DETERMINISTIC_MED)) {
4131 zlog_info(
4132 "%s: enabling bgp deterministic-med, this is required"
4133 " for addpath-tx-bestpath-per-AS",
4134 peer->host);
4135 bgp_flag_set(
4136 bgp,
4137 BGP_FLAG_DETERMINISTIC_MED);
4138 bgp_recalculate_all_bestpaths(bgp);
4139 }
4140 }
4141 } else {
4142 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode,
4143 member)) {
4144 if (CHECK_FLAG(member->af_flags[afi][safi],
4145 PEER_FLAG_ADDPATH_TX_ALL_PATHS)
4146 || CHECK_FLAG(
4147 member->af_flags[afi][safi],
4148 PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS)) {
4149 addpath_tx_used = 1;
4150 break;
4151 }
4152 }
4153 }
4154
4155 bgp->addpath_tx_used[afi][safi] = addpath_tx_used;
4156 }
4157
4158 return 0;
4159 }
4160
4161 int peer_af_flag_set(struct peer *peer, afi_t afi, safi_t safi, uint32_t flag)
4162 {
4163 return peer_af_flag_modify(peer, afi, safi, flag, 1);
4164 }
4165
4166 int peer_af_flag_unset(struct peer *peer, afi_t afi, safi_t safi, uint32_t flag)
4167 {
4168 return peer_af_flag_modify(peer, afi, safi, flag, 0);
4169 }
4170
4171
4172 int peer_tx_shutdown_message_set(struct peer *peer, const char *msg)
4173 {
4174 XFREE(MTYPE_PEER_TX_SHUTDOWN_MSG, peer->tx_shutdown_message);
4175 peer->tx_shutdown_message =
4176 msg ? XSTRDUP(MTYPE_PEER_TX_SHUTDOWN_MSG, msg) : NULL;
4177 return 0;
4178 }
4179
4180 int peer_tx_shutdown_message_unset(struct peer *peer)
4181 {
4182 XFREE(MTYPE_PEER_TX_SHUTDOWN_MSG, peer->tx_shutdown_message);
4183 return 0;
4184 }
4185
4186
4187 /* EBGP multihop configuration. */
4188 int peer_ebgp_multihop_set(struct peer *peer, int ttl)
4189 {
4190 struct peer_group *group;
4191 struct listnode *node, *nnode;
4192 struct peer *peer1;
4193
4194 if (peer->sort == BGP_PEER_IBGP || peer->conf_if)
4195 return 0;
4196
4197 /* see comment in peer_ttl_security_hops_set() */
4198 if (ttl != MAXTTL) {
4199 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4200 group = peer->group;
4201 if (group->conf->gtsm_hops != 0)
4202 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4203
4204 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
4205 peer1)) {
4206 if (peer1->sort == BGP_PEER_IBGP)
4207 continue;
4208
4209 if (peer1->gtsm_hops != 0)
4210 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4211 }
4212 } else {
4213 if (peer->gtsm_hops != 0)
4214 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4215 }
4216 }
4217
4218 peer->ttl = ttl;
4219
4220 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4221 if (peer->fd >= 0 && peer->sort != BGP_PEER_IBGP) {
4222 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4223 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4224 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4225 else
4226 bgp_session_reset(peer);
4227 }
4228 } else {
4229 group = peer->group;
4230 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
4231 if (peer->sort == BGP_PEER_IBGP)
4232 continue;
4233
4234 peer->ttl = group->conf->ttl;
4235
4236 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4237 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4238 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4239 else
4240 bgp_session_reset(peer);
4241 }
4242 }
4243 return 0;
4244 }
4245
4246 int peer_ebgp_multihop_unset(struct peer *peer)
4247 {
4248 struct peer_group *group;
4249 struct listnode *node, *nnode;
4250
4251 if (peer->sort == BGP_PEER_IBGP)
4252 return 0;
4253
4254 if (peer->gtsm_hops != 0 && peer->ttl != MAXTTL)
4255 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
4256
4257 if (peer_group_active(peer))
4258 peer->ttl = peer->group->conf->ttl;
4259 else
4260 peer->ttl = 1;
4261
4262 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4263 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4264 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4265 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4266 else
4267 bgp_session_reset(peer);
4268 } else {
4269 group = peer->group;
4270 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
4271 if (peer->sort == BGP_PEER_IBGP)
4272 continue;
4273
4274 peer->ttl = 1;
4275
4276 if (peer->fd >= 0) {
4277 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
4278 bgp_notify_send(
4279 peer, BGP_NOTIFY_CEASE,
4280 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4281 else
4282 bgp_session_reset(peer);
4283 }
4284 }
4285 }
4286 return 0;
4287 }
4288
4289 /* Neighbor description. */
4290 int peer_description_set(struct peer *peer, const char *desc)
4291 {
4292 if (peer->desc)
4293 XFREE(MTYPE_PEER_DESC, peer->desc);
4294
4295 peer->desc = XSTRDUP(MTYPE_PEER_DESC, desc);
4296
4297 return 0;
4298 }
4299
4300 int peer_description_unset(struct peer *peer)
4301 {
4302 if (peer->desc)
4303 XFREE(MTYPE_PEER_DESC, peer->desc);
4304
4305 peer->desc = NULL;
4306
4307 return 0;
4308 }
4309
4310 /* Neighbor update-source. */
4311 int peer_update_source_if_set(struct peer *peer, const char *ifname)
4312 {
4313 struct peer *member;
4314 struct listnode *node, *nnode;
4315
4316 /* Set flag and configuration on peer. */
4317 peer_flag_set(peer, PEER_FLAG_UPDATE_SOURCE);
4318 if (peer->update_if) {
4319 if (strcmp(peer->update_if, ifname) == 0)
4320 return 0;
4321 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
4322 }
4323 peer->update_if = XSTRDUP(MTYPE_PEER_UPDATE_SOURCE, ifname);
4324 sockunion_free(peer->update_source);
4325 peer->update_source = NULL;
4326
4327 /* Check if handling a regular peer. */
4328 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4329 /* Send notification or reset peer depending on state. */
4330 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4331 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4332 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4333 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4334 } else
4335 bgp_session_reset(peer);
4336
4337 /* Skip peer-group mechanics for regular peers. */
4338 return 0;
4339 }
4340
4341 /*
4342 * Set flag and configuration on all peer-group members, unless they are
4343 * explicitely overriding peer-group configuration.
4344 */
4345 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4346 /* Skip peers with overridden configuration. */
4347 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4348 continue;
4349
4350 /* Skip peers with the same configuration. */
4351 if (member->update_if) {
4352 if (strcmp(member->update_if, ifname) == 0)
4353 continue;
4354 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4355 }
4356
4357 /* Set flag and configuration on peer-group member. */
4358 SET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4359 member->update_if = XSTRDUP(MTYPE_PEER_UPDATE_SOURCE, ifname);
4360 sockunion_free(member->update_source);
4361 member->update_source = NULL;
4362
4363 /* Send notification or reset peer depending on state. */
4364 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4365 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4366 bgp_notify_send(member, BGP_NOTIFY_CEASE,
4367 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4368 } else
4369 bgp_session_reset(member);
4370 }
4371
4372 return 0;
4373 }
4374
4375 int peer_update_source_addr_set(struct peer *peer, const union sockunion *su)
4376 {
4377 struct peer *member;
4378 struct listnode *node, *nnode;
4379
4380 /* Set flag and configuration on peer. */
4381 peer_flag_set(peer, PEER_FLAG_UPDATE_SOURCE);
4382 if (peer->update_source) {
4383 if (sockunion_cmp(peer->update_source, su) == 0)
4384 return 0;
4385 sockunion_free(peer->update_source);
4386 }
4387 peer->update_source = sockunion_dup(su);
4388 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
4389
4390 /* Check if handling a regular peer. */
4391 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4392 /* Send notification or reset peer depending on state. */
4393 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4394 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4395 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4396 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4397 } else
4398 bgp_session_reset(peer);
4399
4400 /* Skip peer-group mechanics for regular peers. */
4401 return 0;
4402 }
4403
4404 /*
4405 * Set flag and configuration on all peer-group members, unless they are
4406 * explicitely overriding peer-group configuration.
4407 */
4408 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4409 /* Skip peers with overridden configuration. */
4410 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4411 continue;
4412
4413 /* Skip peers with the same configuration. */
4414 if (member->update_source) {
4415 if (sockunion_cmp(member->update_source, su) == 0)
4416 continue;
4417 sockunion_free(member->update_source);
4418 }
4419
4420 /* Set flag and configuration on peer-group member. */
4421 SET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4422 member->update_source = sockunion_dup(su);
4423 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4424
4425 /* Send notification or reset peer depending on state. */
4426 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4427 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4428 bgp_notify_send(member, BGP_NOTIFY_CEASE,
4429 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4430 } else
4431 bgp_session_reset(member);
4432 }
4433
4434 return 0;
4435 }
4436
4437 int peer_update_source_unset(struct peer *peer)
4438 {
4439 struct peer *member;
4440 struct listnode *node, *nnode;
4441
4442 if (!CHECK_FLAG(peer->flags, PEER_FLAG_UPDATE_SOURCE))
4443 return 0;
4444
4445 /* Inherit configuration from peer-group if peer is member. */
4446 if (peer_group_active(peer)) {
4447 peer_flag_inherit(peer, PEER_FLAG_UPDATE_SOURCE);
4448 PEER_SU_ATTR_INHERIT(peer, peer->group, update_source);
4449 PEER_STR_ATTR_INHERIT(peer, peer->group, update_if,
4450 MTYPE_PEER_UPDATE_SOURCE);
4451 } else {
4452 /* Otherwise remove flag and configuration from peer. */
4453 peer_flag_unset(peer, PEER_FLAG_UPDATE_SOURCE);
4454 sockunion_free(peer->update_source);
4455 peer->update_source = NULL;
4456 XFREE(MTYPE_PEER_UPDATE_SOURCE, peer->update_if);
4457 }
4458
4459 /* Check if handling a regular peer. */
4460 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4461 /* Send notification or reset peer depending on state. */
4462 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
4463 peer->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4464 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
4465 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4466 } else
4467 bgp_session_reset(peer);
4468
4469 /* Skip peer-group mechanics for regular peers. */
4470 return 0;
4471 }
4472
4473 /*
4474 * Set flag and configuration on all peer-group members, unless they are
4475 * explicitely overriding peer-group configuration.
4476 */
4477 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4478 /* Skip peers with overridden configuration. */
4479 if (CHECK_FLAG(member->flags_override, PEER_FLAG_UPDATE_SOURCE))
4480 continue;
4481
4482 /* Skip peers with the same configuration. */
4483 if (!CHECK_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE)
4484 && !member->update_source && !member->update_if)
4485 continue;
4486
4487 /* Remove flag and configuration on peer-group member. */
4488 UNSET_FLAG(member->flags, PEER_FLAG_UPDATE_SOURCE);
4489 sockunion_free(member->update_source);
4490 member->update_source = NULL;
4491 XFREE(MTYPE_PEER_UPDATE_SOURCE, member->update_if);
4492
4493 /* Send notification or reset peer depending on state. */
4494 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
4495 member->last_reset = PEER_DOWN_UPDATE_SOURCE_CHANGE;
4496 bgp_notify_send(member, BGP_NOTIFY_CEASE,
4497 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
4498 } else
4499 bgp_session_reset(member);
4500 }
4501
4502 return 0;
4503 }
4504
4505 int peer_default_originate_set(struct peer *peer, afi_t afi, safi_t safi,
4506 const char *rmap, struct route_map *route_map)
4507 {
4508 struct peer *member;
4509 struct listnode *node, *nnode;
4510
4511 /* Set flag and configuration on peer. */
4512 peer_af_flag_set(peer, afi, safi, PEER_FLAG_DEFAULT_ORIGINATE);
4513 if (rmap) {
4514 if (!peer->default_rmap[afi][safi].name
4515 || strcmp(rmap, peer->default_rmap[afi][safi].name) != 0) {
4516 if (peer->default_rmap[afi][safi].name)
4517 XFREE(MTYPE_ROUTE_MAP_NAME,
4518 peer->default_rmap[afi][safi].name);
4519
4520 peer->default_rmap[afi][safi].name =
4521 XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap);
4522 peer->default_rmap[afi][safi].map = route_map;
4523 }
4524 } else if (!rmap) {
4525 if (peer->default_rmap[afi][safi].name)
4526 XFREE(MTYPE_ROUTE_MAP_NAME,
4527 peer->default_rmap[afi][safi].name);
4528
4529 peer->default_rmap[afi][safi].name = NULL;
4530 peer->default_rmap[afi][safi].map = NULL;
4531 }
4532
4533 /* Check if handling a regular peer. */
4534 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4535 /* Update peer route announcements. */
4536 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4537 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4538 bgp_default_originate(peer, afi, safi, 0);
4539 bgp_announce_route(peer, afi, safi);
4540 }
4541
4542 /* Skip peer-group mechanics for regular peers. */
4543 return 0;
4544 }
4545
4546 /*
4547 * Set flag and configuration on all peer-group members, unless they are
4548 * explicitely overriding peer-group configuration.
4549 */
4550 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4551 /* Skip peers with overridden configuration. */
4552 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4553 PEER_FLAG_DEFAULT_ORIGINATE))
4554 continue;
4555
4556 /* Set flag and configuration on peer-group member. */
4557 SET_FLAG(member->af_flags[afi][safi],
4558 PEER_FLAG_DEFAULT_ORIGINATE);
4559 if (rmap) {
4560 if (member->default_rmap[afi][safi].name)
4561 XFREE(MTYPE_ROUTE_MAP_NAME,
4562 member->default_rmap[afi][safi].name);
4563
4564 member->default_rmap[afi][safi].name =
4565 XSTRDUP(MTYPE_ROUTE_MAP_NAME, rmap);
4566 member->default_rmap[afi][safi].map = route_map;
4567 }
4568
4569 /* Update peer route announcements. */
4570 if (member->status == Established
4571 && member->afc_nego[afi][safi]) {
4572 update_group_adjust_peer(
4573 peer_af_find(member, afi, safi));
4574 bgp_default_originate(member, afi, safi, 0);
4575 bgp_announce_route(member, afi, safi);
4576 }
4577 }
4578
4579 return 0;
4580 }
4581
4582 int peer_default_originate_unset(struct peer *peer, afi_t afi, safi_t safi)
4583 {
4584 struct peer *member;
4585 struct listnode *node, *nnode;
4586
4587 /* Inherit configuration from peer-group if peer is member. */
4588 if (peer_group_active(peer)) {
4589 peer_af_flag_inherit(peer, afi, safi,
4590 PEER_FLAG_DEFAULT_ORIGINATE);
4591 PEER_STR_ATTR_INHERIT(peer, peer->group,
4592 default_rmap[afi][safi].name,
4593 MTYPE_ROUTE_MAP_NAME);
4594 PEER_ATTR_INHERIT(peer, peer->group,
4595 default_rmap[afi][safi].map);
4596 } else {
4597 /* Otherwise remove flag and configuration from peer. */
4598 peer_af_flag_unset(peer, afi, safi,
4599 PEER_FLAG_DEFAULT_ORIGINATE);
4600 if (peer->default_rmap[afi][safi].name)
4601 XFREE(MTYPE_ROUTE_MAP_NAME,
4602 peer->default_rmap[afi][safi].name);
4603 peer->default_rmap[afi][safi].name = NULL;
4604 peer->default_rmap[afi][safi].map = NULL;
4605 }
4606
4607 /* Check if handling a regular peer. */
4608 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4609 /* Update peer route announcements. */
4610 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4611 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4612 bgp_default_originate(peer, afi, safi, 1);
4613 bgp_announce_route(peer, afi, safi);
4614 }
4615
4616 /* Skip peer-group mechanics for regular peers. */
4617 return 0;
4618 }
4619
4620 /*
4621 * Remove flag and configuration from all peer-group members, unless
4622 * they are explicitely overriding peer-group configuration.
4623 */
4624 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4625 /* Skip peers with overridden configuration. */
4626 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4627 PEER_FLAG_DEFAULT_ORIGINATE))
4628 continue;
4629
4630 /* Remove flag and configuration on peer-group member. */
4631 UNSET_FLAG(peer->af_flags[afi][safi],
4632 PEER_FLAG_DEFAULT_ORIGINATE);
4633 if (peer->default_rmap[afi][safi].name)
4634 XFREE(MTYPE_ROUTE_MAP_NAME,
4635 peer->default_rmap[afi][safi].name);
4636 peer->default_rmap[afi][safi].name = NULL;
4637 peer->default_rmap[afi][safi].map = NULL;
4638
4639 /* Update peer route announcements. */
4640 if (peer->status == Established && peer->afc_nego[afi][safi]) {
4641 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4642 bgp_default_originate(peer, afi, safi, 1);
4643 bgp_announce_route(peer, afi, safi);
4644 }
4645 }
4646
4647 return 0;
4648 }
4649
4650 int peer_port_set(struct peer *peer, uint16_t port)
4651 {
4652 peer->port = port;
4653 return 0;
4654 }
4655
4656 int peer_port_unset(struct peer *peer)
4657 {
4658 peer->port = BGP_PORT_DEFAULT;
4659 return 0;
4660 }
4661
4662 /*
4663 * Helper function that is called after the name of the policy
4664 * being used by a peer has changed (AF specific). Automatically
4665 * initiates inbound or outbound processing as needed.
4666 */
4667 static void peer_on_policy_change(struct peer *peer, afi_t afi, safi_t safi,
4668 int outbound)
4669 {
4670 if (outbound) {
4671 update_group_adjust_peer(peer_af_find(peer, afi, safi));
4672 if (peer->status == Established)
4673 bgp_announce_route(peer, afi, safi);
4674 } else {
4675 if (peer->status != Established)
4676 return;
4677
4678 if (CHECK_FLAG(peer->af_flags[afi][safi],
4679 PEER_FLAG_SOFT_RECONFIG))
4680 bgp_soft_reconfig_in(peer, afi, safi);
4681 else if (CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV)
4682 || CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV))
4683 bgp_route_refresh_send(peer, afi, safi, 0, 0, 0);
4684 }
4685 }
4686
4687
4688 /* neighbor weight. */
4689 int peer_weight_set(struct peer *peer, afi_t afi, safi_t safi, uint16_t weight)
4690 {
4691 struct peer *member;
4692 struct listnode *node, *nnode;
4693
4694 /* Set flag and configuration on peer. */
4695 peer_af_flag_set(peer, afi, safi, PEER_FLAG_WEIGHT);
4696 if (peer->weight[afi][safi] != weight) {
4697 peer->weight[afi][safi] = weight;
4698 peer_on_policy_change(peer, afi, safi, 0);
4699 }
4700
4701 /* Skip peer-group mechanics for regular peers. */
4702 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4703 return 0;
4704
4705 /*
4706 * Set flag and configuration on all peer-group members, unless they are
4707 * explicitely overriding peer-group configuration.
4708 */
4709 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4710 /* Skip peers with overridden configuration. */
4711 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4712 PEER_FLAG_WEIGHT))
4713 continue;
4714
4715 /* Set flag and configuration on peer-group member. */
4716 SET_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT);
4717 if (member->weight[afi][safi] != weight) {
4718 member->weight[afi][safi] = weight;
4719 peer_on_policy_change(member, afi, safi, 0);
4720 }
4721 }
4722
4723 return 0;
4724 }
4725
4726 int peer_weight_unset(struct peer *peer, afi_t afi, safi_t safi)
4727 {
4728 struct peer *member;
4729 struct listnode *node, *nnode;
4730
4731 if (!CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_WEIGHT))
4732 return 0;
4733
4734 /* Inherit configuration from peer-group if peer is member. */
4735 if (peer_group_active(peer)) {
4736 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_WEIGHT);
4737 PEER_ATTR_INHERIT(peer, peer->group, weight[afi][safi]);
4738
4739 peer_on_policy_change(peer, afi, safi, 0);
4740 return 0;
4741 }
4742
4743 /* Remove flag and configuration from peer. */
4744 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_WEIGHT);
4745 peer->weight[afi][safi] = 0;
4746 peer_on_policy_change(peer, afi, safi, 0);
4747
4748 /* Skip peer-group mechanics for regular peers. */
4749 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4750 return 0;
4751
4752 /*
4753 * Remove flag and configuration from all peer-group members, unless
4754 * they are explicitely overriding peer-group configuration.
4755 */
4756 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4757 /* Skip peers with overridden configuration. */
4758 if (CHECK_FLAG(member->af_flags_override[afi][safi],
4759 PEER_FLAG_WEIGHT))
4760 continue;
4761
4762 /* Skip peers where flag is already disabled. */
4763 if (!CHECK_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT))
4764 continue;
4765
4766 /* Remove flag and configuration on peer-group member. */
4767 UNSET_FLAG(member->af_flags[afi][safi], PEER_FLAG_WEIGHT);
4768 member->weight[afi][safi] = 0;
4769 peer_on_policy_change(member, afi, safi, 0);
4770 }
4771
4772 return 0;
4773 }
4774
4775 int peer_timers_set(struct peer *peer, uint32_t keepalive, uint32_t holdtime)
4776 {
4777 struct peer *member;
4778 struct listnode *node, *nnode;
4779
4780 if (keepalive > 65535)
4781 return BGP_ERR_INVALID_VALUE;
4782
4783 if (holdtime > 65535)
4784 return BGP_ERR_INVALID_VALUE;
4785
4786 if (holdtime < 3 && holdtime != 0)
4787 return BGP_ERR_INVALID_VALUE;
4788
4789 /* Set flag and configuration on peer. */
4790 peer_flag_set(peer, PEER_FLAG_TIMER);
4791 peer->holdtime = holdtime;
4792 peer->keepalive = (keepalive < holdtime / 3 ? keepalive : holdtime / 3);
4793
4794 /* Skip peer-group mechanics for regular peers. */
4795 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4796 return 0;
4797
4798 /*
4799 * Set flag and configuration on all peer-group members, unless they are
4800 * explicitely overriding peer-group configuration.
4801 */
4802 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4803 /* Skip peers with overridden configuration. */
4804 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER))
4805 continue;
4806
4807 /* Set flag and configuration on peer-group member. */
4808 SET_FLAG(member->flags, PEER_FLAG_TIMER);
4809 PEER_ATTR_INHERIT(peer, peer->group, holdtime);
4810 PEER_ATTR_INHERIT(peer, peer->group, keepalive);
4811 }
4812
4813 return 0;
4814 }
4815
4816 int peer_timers_unset(struct peer *peer)
4817 {
4818 struct peer *member;
4819 struct listnode *node, *nnode;
4820
4821 /* Inherit configuration from peer-group if peer is member. */
4822 if (peer_group_active(peer)) {
4823 peer_flag_inherit(peer, PEER_FLAG_TIMER);
4824 PEER_ATTR_INHERIT(peer, peer->group, holdtime);
4825 PEER_ATTR_INHERIT(peer, peer->group, keepalive);
4826 } else {
4827 /* Otherwise remove flag and configuration from peer. */
4828 peer_flag_unset(peer, PEER_FLAG_TIMER);
4829 peer->holdtime = 0;
4830 peer->keepalive = 0;
4831 }
4832
4833 /* Skip peer-group mechanics for regular peers. */
4834 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4835 return 0;
4836
4837 /*
4838 * Remove flag and configuration from all peer-group members, unless
4839 * they are explicitely overriding peer-group configuration.
4840 */
4841 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4842 /* Skip peers with overridden configuration. */
4843 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER))
4844 continue;
4845
4846 /* Remove flag and configuration on peer-group member. */
4847 UNSET_FLAG(member->flags, PEER_FLAG_TIMER);
4848 member->holdtime = 0;
4849 member->keepalive = 0;
4850 }
4851
4852 return 0;
4853 }
4854
4855 int peer_timers_connect_set(struct peer *peer, uint32_t connect)
4856 {
4857 struct peer *member;
4858 struct listnode *node, *nnode;
4859
4860 if (connect > 65535)
4861 return BGP_ERR_INVALID_VALUE;
4862
4863 /* Set flag and configuration on peer. */
4864 peer_flag_set(peer, PEER_FLAG_TIMER_CONNECT);
4865 peer->connect = connect;
4866 peer->v_connect = connect;
4867
4868 /* Skip peer-group mechanics for regular peers. */
4869 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4870 return 0;
4871
4872 /*
4873 * Set flag and configuration on all peer-group members, unless they are
4874 * explicitely overriding peer-group configuration.
4875 */
4876 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4877 /* Skip peers with overridden configuration. */
4878 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER_CONNECT))
4879 continue;
4880
4881 /* Set flag and configuration on peer-group member. */
4882 SET_FLAG(member->flags, PEER_FLAG_TIMER_CONNECT);
4883 member->connect = connect;
4884 member->v_connect = connect;
4885 }
4886
4887 return 0;
4888 }
4889
4890 int peer_timers_connect_unset(struct peer *peer)
4891 {
4892 struct peer *member;
4893 struct listnode *node, *nnode;
4894
4895 /* Inherit configuration from peer-group if peer is member. */
4896 if (peer_group_active(peer)) {
4897 peer_flag_inherit(peer, PEER_FLAG_TIMER_CONNECT);
4898 PEER_ATTR_INHERIT(peer, peer->group, connect);
4899 } else {
4900 /* Otherwise remove flag and configuration from peer. */
4901 peer_flag_unset(peer, PEER_FLAG_TIMER_CONNECT);
4902 peer->connect = 0;
4903 }
4904
4905 /* Set timer with fallback to default value. */
4906 if (peer->connect)
4907 peer->v_connect = peer->connect;
4908 else
4909 peer->v_connect = BGP_DEFAULT_CONNECT_RETRY;
4910
4911 /* Skip peer-group mechanics for regular peers. */
4912 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
4913 return 0;
4914
4915 /*
4916 * Remove flag and configuration from all peer-group members, unless
4917 * they are explicitely overriding peer-group configuration.
4918 */
4919 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4920 /* Skip peers with overridden configuration. */
4921 if (CHECK_FLAG(member->flags_override, PEER_FLAG_TIMER_CONNECT))
4922 continue;
4923
4924 /* Remove flag and configuration on peer-group member. */
4925 UNSET_FLAG(member->flags, PEER_FLAG_TIMER_CONNECT);
4926 member->connect = 0;
4927 member->v_connect = BGP_DEFAULT_CONNECT_RETRY;
4928 }
4929
4930 return 0;
4931 }
4932
4933 int peer_advertise_interval_set(struct peer *peer, uint32_t routeadv)
4934 {
4935 struct peer *member;
4936 struct listnode *node, *nnode;
4937
4938 if (routeadv > 600)
4939 return BGP_ERR_INVALID_VALUE;
4940
4941 /* Set flag and configuration on peer. */
4942 peer_flag_set(peer, PEER_FLAG_ROUTEADV);
4943 peer->routeadv = routeadv;
4944 peer->v_routeadv = routeadv;
4945
4946 /* Check if handling a regular peer. */
4947 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
4948 /* Update peer route announcements. */
4949 update_group_adjust_peer_afs(peer);
4950 if (peer->status == Established)
4951 bgp_announce_route_all(peer);
4952
4953 /* Skip peer-group mechanics for regular peers. */
4954 return 0;
4955 }
4956
4957 /*
4958 * Set flag and configuration on all peer-group members, unless they are
4959 * explicitely overriding peer-group configuration.
4960 */
4961 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
4962 /* Skip peers with overridden configuration. */
4963 if (CHECK_FLAG(member->flags_override, PEER_FLAG_ROUTEADV))
4964 continue;
4965
4966 /* Set flag and configuration on peer-group member. */
4967 SET_FLAG(member->flags, PEER_FLAG_ROUTEADV);
4968 member->routeadv = routeadv;
4969 member->v_routeadv = routeadv;
4970
4971 /* Update peer route announcements. */
4972 update_group_adjust_peer_afs(member);
4973 if (member->status == Established)
4974 bgp_announce_route_all(member);
4975 }
4976
4977 return 0;
4978 }
4979
4980 int peer_advertise_interval_unset(struct peer *peer)
4981 {
4982 struct peer *member;
4983 struct listnode *node, *nnode;
4984
4985 /* Inherit configuration from peer-group if peer is member. */
4986 if (peer_group_active(peer)) {
4987 peer_flag_inherit(peer, PEER_FLAG_ROUTEADV);
4988 PEER_ATTR_INHERIT(peer, peer->group, routeadv);
4989 } else {
4990 /* Otherwise remove flag and configuration from peer. */
4991 peer_flag_unset(peer, PEER_FLAG_ROUTEADV);
4992 peer->routeadv = 0;
4993 }
4994
4995 /* Set timer with fallback to default value. */
4996 if (peer->routeadv)
4997 peer->v_routeadv = peer->routeadv;
4998 else
4999 peer->v_routeadv = (peer->sort == BGP_PEER_IBGP)
5000 ? BGP_DEFAULT_IBGP_ROUTEADV
5001 : BGP_DEFAULT_EBGP_ROUTEADV;
5002
5003 /* Check if handling a regular peer. */
5004 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5005 /* Update peer route announcements. */
5006 update_group_adjust_peer_afs(peer);
5007 if (peer->status == Established)
5008 bgp_announce_route_all(peer);
5009
5010 /* Skip peer-group mechanics for regular peers. */
5011 return 0;
5012 }
5013
5014 /*
5015 * Remove flag and configuration from all peer-group members, unless
5016 * they are explicitely overriding peer-group configuration.
5017 */
5018 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5019 /* Skip peers with overridden configuration. */
5020 if (CHECK_FLAG(member->flags_override, PEER_FLAG_ROUTEADV))
5021 continue;
5022
5023 /* Remove flag and configuration on peer-group member. */
5024 UNSET_FLAG(member->flags, PEER_FLAG_ROUTEADV);
5025 member->routeadv = 0;
5026 member->v_routeadv = (member->sort == BGP_PEER_IBGP)
5027 ? BGP_DEFAULT_IBGP_ROUTEADV
5028 : BGP_DEFAULT_EBGP_ROUTEADV;
5029
5030 /* Update peer route announcements. */
5031 update_group_adjust_peer_afs(member);
5032 if (member->status == Established)
5033 bgp_announce_route_all(member);
5034 }
5035
5036 return 0;
5037 }
5038
5039 /* neighbor interface */
5040 void peer_interface_set(struct peer *peer, const char *str)
5041 {
5042 if (peer->ifname)
5043 XFREE(MTYPE_BGP_PEER_IFNAME, peer->ifname);
5044 peer->ifname = XSTRDUP(MTYPE_BGP_PEER_IFNAME, str);
5045 }
5046
5047 void peer_interface_unset(struct peer *peer)
5048 {
5049 if (peer->ifname)
5050 XFREE(MTYPE_BGP_PEER_IFNAME, peer->ifname);
5051 peer->ifname = NULL;
5052 }
5053
5054 /* Allow-as in. */
5055 int peer_allowas_in_set(struct peer *peer, afi_t afi, safi_t safi,
5056 int allow_num, int origin)
5057 {
5058 struct peer *member;
5059 struct listnode *node, *nnode;
5060
5061 if (!origin && (allow_num < 1 || allow_num > 10))
5062 return BGP_ERR_INVALID_VALUE;
5063
5064 /* Set flag and configuration on peer. */
5065 peer_af_flag_set(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5066 if (origin) {
5067 if (peer->allowas_in[afi][safi] != 0
5068 || !CHECK_FLAG(peer->af_flags[afi][safi],
5069 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5070 peer_af_flag_set(peer, afi, safi,
5071 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5072 peer->allowas_in[afi][safi] = 0;
5073 peer_on_policy_change(peer, afi, safi, 0);
5074 }
5075 } else {
5076 if (peer->allowas_in[afi][safi] != allow_num
5077 || CHECK_FLAG(peer->af_flags[afi][safi],
5078 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5079
5080 peer_af_flag_unset(peer, afi, safi,
5081 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5082 peer->allowas_in[afi][safi] = allow_num;
5083 peer_on_policy_change(peer, afi, safi, 0);
5084 }
5085 }
5086
5087 /* Skip peer-group mechanics for regular peers. */
5088 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5089 return 0;
5090
5091 /*
5092 * Set flag and configuration on all peer-group members, unless
5093 * they are explicitely overriding peer-group configuration.
5094 */
5095 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5096 /* Skip peers with overridden configuration. */
5097 if (CHECK_FLAG(member->af_flags_override[afi][safi],
5098 PEER_FLAG_ALLOWAS_IN))
5099 continue;
5100
5101 /* Set flag and configuration on peer-group member. */
5102 SET_FLAG(member->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN);
5103 if (origin) {
5104 if (member->allowas_in[afi][safi] != 0
5105 || !CHECK_FLAG(member->af_flags[afi][safi],
5106 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5107 SET_FLAG(member->af_flags[afi][safi],
5108 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5109 member->allowas_in[afi][safi] = 0;
5110 peer_on_policy_change(peer, afi, safi, 0);
5111 }
5112 } else {
5113 if (member->allowas_in[afi][safi] != allow_num
5114 || CHECK_FLAG(member->af_flags[afi][safi],
5115 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
5116 UNSET_FLAG(member->af_flags[afi][safi],
5117 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5118 member->allowas_in[afi][safi] = allow_num;
5119 peer_on_policy_change(peer, afi, safi, 0);
5120 }
5121 }
5122 }
5123
5124 return 0;
5125 }
5126
5127 int peer_allowas_in_unset(struct peer *peer, afi_t afi, safi_t safi)
5128 {
5129 struct peer *member;
5130 struct listnode *node, *nnode;
5131
5132 /* Skip peer if flag is already disabled. */
5133 if (!CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN))
5134 return 0;
5135
5136 /* Inherit configuration from peer-group if peer is member. */
5137 if (peer_group_active(peer)) {
5138 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5139 peer_af_flag_inherit(peer, afi, safi,
5140 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5141 PEER_ATTR_INHERIT(peer, peer->group, allowas_in[afi][safi]);
5142 peer_on_policy_change(peer, afi, safi, 0);
5143
5144 return 0;
5145 }
5146
5147 /* Remove flag and configuration from peer. */
5148 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_ALLOWAS_IN);
5149 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_ALLOWAS_IN_ORIGIN);
5150 peer->allowas_in[afi][safi] = 0;
5151 peer_on_policy_change(peer, afi, safi, 0);
5152
5153 /* Skip peer-group mechanics if handling a regular peer. */
5154 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP))
5155 return 0;
5156
5157 /*
5158 * Remove flags and configuration from all peer-group members, unless
5159 * they are explicitely overriding peer-group configuration.
5160 */
5161 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5162 /* Skip peers with overridden configuration. */
5163 if (CHECK_FLAG(member->af_flags_override[afi][safi],
5164 PEER_FLAG_ALLOWAS_IN))
5165 continue;
5166
5167 /* Skip peers where flag is already disabled. */
5168 if (!CHECK_FLAG(member->af_flags[afi][safi],
5169 PEER_FLAG_ALLOWAS_IN))
5170 continue;
5171
5172 /* Remove flags and configuration on peer-group member. */
5173 UNSET_FLAG(member->af_flags[afi][safi], PEER_FLAG_ALLOWAS_IN);
5174 UNSET_FLAG(member->af_flags[afi][safi],
5175 PEER_FLAG_ALLOWAS_IN_ORIGIN);
5176 member->allowas_in[afi][safi] = 0;
5177 peer_on_policy_change(member, afi, safi, 0);
5178 }
5179
5180 return 0;
5181 }
5182
5183 int peer_local_as_set(struct peer *peer, as_t as, int no_prepend,
5184 int replace_as)
5185 {
5186 bool old_no_prepend, old_replace_as;
5187 struct bgp *bgp = peer->bgp;
5188 struct peer *member;
5189 struct listnode *node, *nnode;
5190
5191 if (peer_sort(peer) != BGP_PEER_EBGP
5192 && peer_sort(peer) != BGP_PEER_INTERNAL)
5193 return BGP_ERR_LOCAL_AS_ALLOWED_ONLY_FOR_EBGP;
5194
5195 if (bgp->as == as)
5196 return BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS;
5197
5198 if (peer->as == as)
5199 return BGP_ERR_CANNOT_HAVE_LOCAL_AS_SAME_AS_REMOTE_AS;
5200
5201 /* Save previous flag states. */
5202 old_no_prepend =
5203 !!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5204 old_replace_as =
5205 !!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5206
5207 /* Set flag and configuration on peer. */
5208 peer_flag_set(peer, PEER_FLAG_LOCAL_AS);
5209 peer_flag_modify(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND, no_prepend);
5210 peer_flag_modify(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS, replace_as);
5211
5212 if (peer->change_local_as == as && old_no_prepend == no_prepend
5213 && old_replace_as == replace_as)
5214 return 0;
5215 peer->change_local_as = as;
5216
5217 /* Check if handling a regular peer. */
5218 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5219 /* Send notification or reset peer depending on state. */
5220 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
5221 peer->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5222 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5223 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5224 } else
5225 bgp_session_reset(peer);
5226
5227 /* Skip peer-group mechanics for regular peers. */
5228 return 0;
5229 }
5230
5231 /*
5232 * Set flag and configuration on all peer-group members, unless they are
5233 * explicitely overriding peer-group configuration.
5234 */
5235 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5236 /* Skip peers with overridden configuration. */
5237 if (CHECK_FLAG(member->flags_override, PEER_FLAG_LOCAL_AS))
5238 continue;
5239
5240 /* Skip peers with the same configuration. */
5241 old_no_prepend = CHECK_FLAG(member->flags,
5242 PEER_FLAG_LOCAL_AS_NO_PREPEND);
5243 old_replace_as = CHECK_FLAG(member->flags,
5244 PEER_FLAG_LOCAL_AS_REPLACE_AS);
5245 if (member->change_local_as == as
5246 && CHECK_FLAG(member->flags, PEER_FLAG_LOCAL_AS)
5247 && old_no_prepend == no_prepend
5248 && old_replace_as == replace_as)
5249 continue;
5250
5251 /* Set flag and configuration on peer-group member. */
5252 SET_FLAG(member->flags, PEER_FLAG_LOCAL_AS);
5253 COND_FLAG(member->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND,
5254 no_prepend);
5255 COND_FLAG(member->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS,
5256 replace_as);
5257 member->change_local_as = as;
5258
5259 /* Send notification or stop peer depending on state. */
5260 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
5261 member->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5262 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5263 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5264 } else
5265 BGP_EVENT_ADD(member, BGP_Stop);
5266 }
5267
5268 return 0;
5269 }
5270
5271 int peer_local_as_unset(struct peer *peer)
5272 {
5273 struct peer *member;
5274 struct listnode *node, *nnode;
5275
5276 if (!CHECK_FLAG(peer->flags, PEER_FLAG_LOCAL_AS))
5277 return 0;
5278
5279 /* Inherit configuration from peer-group if peer is member. */
5280 if (peer_group_active(peer)) {
5281 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS);
5282 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5283 peer_flag_inherit(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5284 PEER_ATTR_INHERIT(peer, peer->group, change_local_as);
5285 } else {
5286 /* Otherwise remove flag and configuration from peer. */
5287 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS);
5288 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5289 peer_flag_unset(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5290 peer->change_local_as = 0;
5291 }
5292
5293 /* Check if handling a regular peer. */
5294 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5295 /* Send notification or stop peer depending on state. */
5296 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status)) {
5297 peer->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5298 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5299 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5300 } else
5301 BGP_EVENT_ADD(peer, BGP_Stop);
5302
5303 /* Skip peer-group mechanics for regular peers. */
5304 return 0;
5305 }
5306
5307 /*
5308 * Remove flag and configuration from all peer-group members, unless
5309 * they are explicitely overriding peer-group configuration.
5310 */
5311 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5312 /* Skip peers with overridden configuration. */
5313 if (CHECK_FLAG(member->flags_override, PEER_FLAG_LOCAL_AS))
5314 continue;
5315
5316 /* Remove flag and configuration on peer-group member. */
5317 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS);
5318 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS_NO_PREPEND);
5319 UNSET_FLAG(member->flags, PEER_FLAG_LOCAL_AS_REPLACE_AS);
5320 member->change_local_as = 0;
5321
5322 /* Send notification or stop peer depending on state. */
5323 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status)) {
5324 member->last_reset = PEER_DOWN_LOCAL_AS_CHANGE;
5325 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5326 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5327 } else
5328 bgp_session_reset(member);
5329 }
5330
5331 return 0;
5332 }
5333
5334 /* Set password for authenticating with the peer. */
5335 int peer_password_set(struct peer *peer, const char *password)
5336 {
5337 struct peer *member;
5338 struct listnode *node, *nnode;
5339 int len = password ? strlen(password) : 0;
5340 int ret = BGP_SUCCESS;
5341
5342 if ((len < PEER_PASSWORD_MINLEN) || (len > PEER_PASSWORD_MAXLEN))
5343 return BGP_ERR_INVALID_VALUE;
5344
5345 /* Set flag and configuration on peer. */
5346 peer_flag_set(peer, PEER_FLAG_PASSWORD);
5347 if (peer->password && strcmp(peer->password, password) == 0)
5348 return 0;
5349 XFREE(MTYPE_PEER_PASSWORD, peer->password);
5350 peer->password = XSTRDUP(MTYPE_PEER_PASSWORD, password);
5351
5352 /* Check if handling a regular peer. */
5353 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5354 /* Send notification or reset peer depending on state. */
5355 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
5356 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5357 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5358 else
5359 bgp_session_reset(peer);
5360
5361 /*
5362 * Attempt to install password on socket and skip peer-group
5363 * mechanics.
5364 */
5365 if (BGP_PEER_SU_UNSPEC(peer))
5366 return BGP_SUCCESS;
5367 return (bgp_md5_set(peer) >= 0) ? BGP_SUCCESS
5368 : BGP_ERR_TCPSIG_FAILED;
5369 }
5370
5371 /*
5372 * Set flag and configuration on all peer-group members, unless they are
5373 * explicitely overriding peer-group configuration.
5374 */
5375 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5376 /* Skip peers with overridden configuration. */
5377 if (CHECK_FLAG(member->flags_override, PEER_FLAG_PASSWORD))
5378 continue;
5379
5380 /* Skip peers with the same password. */
5381 if (member->password && strcmp(member->password, password) == 0)
5382 continue;
5383
5384 /* Set flag and configuration on peer-group member. */
5385 SET_FLAG(member->flags, PEER_FLAG_PASSWORD);
5386 if (member->password)
5387 XFREE(MTYPE_PEER_PASSWORD, member->password);
5388 member->password = XSTRDUP(MTYPE_PEER_PASSWORD, password);
5389
5390 /* Send notification or reset peer depending on state. */
5391 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status))
5392 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5393 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5394 else
5395 bgp_session_reset(member);
5396
5397 /* Attempt to install password on socket. */
5398 if (!BGP_PEER_SU_UNSPEC(member) && bgp_md5_set(member) < 0)
5399 ret = BGP_ERR_TCPSIG_FAILED;
5400 }
5401
5402 return ret;
5403 }
5404
5405 int peer_password_unset(struct peer *peer)
5406 {
5407 struct peer *member;
5408 struct listnode *node, *nnode;
5409
5410 if (!CHECK_FLAG(peer->flags, PEER_FLAG_PASSWORD))
5411 return 0;
5412
5413 /* Inherit configuration from peer-group if peer is member. */
5414 if (peer_group_active(peer)) {
5415 peer_flag_inherit(peer, PEER_FLAG_PASSWORD);
5416 PEER_STR_ATTR_INHERIT(peer, peer->group, password,
5417 MTYPE_PEER_PASSWORD);
5418 } else {
5419 /* Otherwise remove flag and configuration from peer. */
5420 peer_flag_unset(peer, PEER_FLAG_PASSWORD);
5421 XFREE(MTYPE_PEER_PASSWORD, peer->password);
5422 }
5423
5424 /* Check if handling a regular peer. */
5425 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5426 /* Send notification or reset peer depending on state. */
5427 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
5428 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
5429 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5430 else
5431 bgp_session_reset(peer);
5432
5433 /* Attempt to uninstall password on socket. */
5434 if (!BGP_PEER_SU_UNSPEC(peer))
5435 bgp_md5_unset(peer);
5436
5437 /* Skip peer-group mechanics for regular peers. */
5438 return 0;
5439 }
5440
5441 /*
5442 * Remove flag and configuration from all peer-group members, unless
5443 * they are explicitely overriding peer-group configuration.
5444 */
5445 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5446 /* Skip peers with overridden configuration. */
5447 if (CHECK_FLAG(member->flags_override, PEER_FLAG_PASSWORD))
5448 continue;
5449
5450 /* Remove flag and configuration on peer-group member. */
5451 UNSET_FLAG(member->flags, PEER_FLAG_PASSWORD);
5452 XFREE(MTYPE_PEER_PASSWORD, member->password);
5453
5454 /* Send notification or reset peer depending on state. */
5455 if (BGP_IS_VALID_STATE_FOR_NOTIF(member->status))
5456 bgp_notify_send(member, BGP_NOTIFY_CEASE,
5457 BGP_NOTIFY_CEASE_CONFIG_CHANGE);
5458 else
5459 bgp_session_reset(member);
5460
5461 /* Attempt to uninstall password on socket. */
5462 if (!BGP_PEER_SU_UNSPEC(member))
5463 bgp_md5_unset(member);
5464 }
5465
5466 return 0;
5467 }
5468
5469
5470 /* Set distribute list to the peer. */
5471 int peer_distribute_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
5472 const char *name)
5473 {
5474 struct peer *member;
5475 struct bgp_filter *filter;
5476 struct listnode *node, *nnode;
5477
5478 if (direct != FILTER_IN && direct != FILTER_OUT)
5479 return BGP_ERR_INVALID_VALUE;
5480
5481 /* Set configuration on peer. */
5482 filter = &peer->filter[afi][safi];
5483 if (filter->plist[direct].name)
5484 return BGP_ERR_PEER_FILTER_CONFLICT;
5485 if (filter->dlist[direct].name)
5486 XFREE(MTYPE_BGP_FILTER_NAME, filter->dlist[direct].name);
5487 filter->dlist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5488 filter->dlist[direct].alist = access_list_lookup(afi, name);
5489
5490 /* Check if handling a regular peer. */
5491 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5492 /* Set override-flag and process peer route updates. */
5493 SET_FLAG(peer->filter_override[afi][safi][direct],
5494 PEER_FT_DISTRIBUTE_LIST);
5495 peer_on_policy_change(peer, afi, safi,
5496 (direct == FILTER_OUT) ? 1 : 0);
5497
5498 /* Skip peer-group mechanics for regular peers. */
5499 return 0;
5500 }
5501
5502 /*
5503 * Set configuration on all peer-group members, un less they are
5504 * explicitely overriding peer-group configuration.
5505 */
5506 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5507 /* Skip peers with overridden configuration. */
5508 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5509 PEER_FT_DISTRIBUTE_LIST))
5510 continue;
5511
5512 /* Set configuration on peer-group member. */
5513 filter = &member->filter[afi][safi];
5514 if (filter->dlist[direct].name)
5515 XFREE(MTYPE_BGP_FILTER_NAME,
5516 filter->dlist[direct].name);
5517 filter->dlist[direct].name =
5518 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5519 filter->dlist[direct].alist = access_list_lookup(afi, name);
5520
5521 /* Process peer route updates. */
5522 peer_on_policy_change(member, afi, safi,
5523 (direct == FILTER_OUT) ? 1 : 0);
5524 }
5525
5526 return 0;
5527 }
5528
5529 int peer_distribute_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
5530 {
5531 struct peer *member;
5532 struct bgp_filter *filter;
5533 struct listnode *node, *nnode;
5534
5535 if (direct != FILTER_IN && direct != FILTER_OUT)
5536 return BGP_ERR_INVALID_VALUE;
5537
5538 /* Unset override-flag unconditionally. */
5539 UNSET_FLAG(peer->filter_override[afi][safi][direct],
5540 PEER_FT_DISTRIBUTE_LIST);
5541
5542 /* Inherit configuration from peer-group if peer is member. */
5543 if (peer_group_active(peer)) {
5544 PEER_STR_ATTR_INHERIT(peer, peer->group,
5545 filter[afi][safi].dlist[direct].name,
5546 MTYPE_BGP_FILTER_NAME);
5547 PEER_ATTR_INHERIT(peer, peer->group,
5548 filter[afi][safi].dlist[direct].alist);
5549 } else {
5550 /* Otherwise remove configuration from peer. */
5551 filter = &peer->filter[afi][safi];
5552 if (filter->dlist[direct].name)
5553 XFREE(MTYPE_BGP_FILTER_NAME,
5554 filter->dlist[direct].name);
5555 filter->dlist[direct].name = NULL;
5556 filter->dlist[direct].alist = NULL;
5557 }
5558
5559 /* Check if handling a regular peer. */
5560 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5561 /* Process peer route updates. */
5562 peer_on_policy_change(peer, afi, safi,
5563 (direct == FILTER_OUT) ? 1 : 0);
5564
5565 /* Skip peer-group mechanics for regular peers. */
5566 return 0;
5567 }
5568
5569 /*
5570 * Remove configuration on all peer-group members, unless they are
5571 * explicitely overriding peer-group configuration.
5572 */
5573 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5574 /* Skip peers with overridden configuration. */
5575 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5576 PEER_FT_DISTRIBUTE_LIST))
5577 continue;
5578
5579 /* Remove configuration on peer-group member. */
5580 filter = &member->filter[afi][safi];
5581 if (filter->dlist[direct].name)
5582 XFREE(MTYPE_BGP_FILTER_NAME,
5583 filter->dlist[direct].name);
5584 filter->dlist[direct].name = NULL;
5585 filter->dlist[direct].alist = NULL;
5586
5587 /* Process peer route updates. */
5588 peer_on_policy_change(member, afi, safi,
5589 (direct == FILTER_OUT) ? 1 : 0);
5590 }
5591
5592 return 0;
5593 }
5594
5595 /* Update distribute list. */
5596 static void peer_distribute_update(struct access_list *access)
5597 {
5598 afi_t afi;
5599 safi_t safi;
5600 int direct;
5601 struct listnode *mnode, *mnnode;
5602 struct listnode *node, *nnode;
5603 struct bgp *bgp;
5604 struct peer *peer;
5605 struct peer_group *group;
5606 struct bgp_filter *filter;
5607
5608 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
5609 if (access->name)
5610 update_group_policy_update(bgp, BGP_POLICY_FILTER_LIST,
5611 access->name, 0, 0);
5612 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
5613 FOREACH_AFI_SAFI (afi, safi) {
5614 filter = &peer->filter[afi][safi];
5615
5616 for (direct = FILTER_IN; direct < FILTER_MAX;
5617 direct++) {
5618 if (filter->dlist[direct].name)
5619 filter->dlist[direct]
5620 .alist = access_list_lookup(
5621 afi,
5622 filter->dlist[direct]
5623 .name);
5624 else
5625 filter->dlist[direct].alist =
5626 NULL;
5627 }
5628 }
5629 }
5630 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
5631 FOREACH_AFI_SAFI (afi, safi) {
5632 filter = &group->conf->filter[afi][safi];
5633
5634 for (direct = FILTER_IN; direct < FILTER_MAX;
5635 direct++) {
5636 if (filter->dlist[direct].name)
5637 filter->dlist[direct]
5638 .alist = access_list_lookup(
5639 afi,
5640 filter->dlist[direct]
5641 .name);
5642 else
5643 filter->dlist[direct].alist =
5644 NULL;
5645 }
5646 }
5647 }
5648 #if ENABLE_BGP_VNC
5649 vnc_prefix_list_update(bgp);
5650 #endif
5651 }
5652 }
5653
5654 /* Set prefix list to the peer. */
5655 int peer_prefix_list_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
5656 const char *name)
5657 {
5658 struct peer *member;
5659 struct bgp_filter *filter;
5660 struct listnode *node, *nnode;
5661
5662 if (direct != FILTER_IN && direct != FILTER_OUT)
5663 return BGP_ERR_INVALID_VALUE;
5664
5665 /* Set configuration on peer. */
5666 filter = &peer->filter[afi][safi];
5667 if (filter->dlist[direct].name)
5668 return BGP_ERR_PEER_FILTER_CONFLICT;
5669 if (filter->plist[direct].name)
5670 XFREE(MTYPE_BGP_FILTER_NAME, filter->plist[direct].name);
5671 filter->plist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5672 filter->plist[direct].plist = prefix_list_lookup(afi, name);
5673
5674 /* Check if handling a regular peer. */
5675 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5676 /* Set override-flag and process peer route updates. */
5677 SET_FLAG(peer->filter_override[afi][safi][direct],
5678 PEER_FT_PREFIX_LIST);
5679 peer_on_policy_change(peer, afi, safi,
5680 (direct == FILTER_OUT) ? 1 : 0);
5681
5682 /* Skip peer-group mechanics for regular peers. */
5683 return 0;
5684 }
5685
5686 /*
5687 * Set configuration on all peer-group members, unless they are
5688 * explicitely overriding peer-group configuration.
5689 */
5690 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5691 /* Skip peers with overridden configuration. */
5692 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5693 PEER_FT_PREFIX_LIST))
5694 continue;
5695
5696 /* Set configuration on peer-group member. */
5697 filter = &member->filter[afi][safi];
5698 if (filter->plist[direct].name)
5699 XFREE(MTYPE_BGP_FILTER_NAME,
5700 filter->plist[direct].name);
5701 filter->plist[direct].name =
5702 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5703 filter->plist[direct].plist = prefix_list_lookup(afi, name);
5704
5705 /* Process peer route updates. */
5706 peer_on_policy_change(member, afi, safi,
5707 (direct == FILTER_OUT) ? 1 : 0);
5708 }
5709
5710 return 0;
5711 }
5712
5713 int peer_prefix_list_unset(struct peer *peer, afi_t afi, safi_t safi,
5714 int direct)
5715 {
5716 struct peer *member;
5717 struct bgp_filter *filter;
5718 struct listnode *node, *nnode;
5719
5720 if (direct != FILTER_IN && direct != FILTER_OUT)
5721 return BGP_ERR_INVALID_VALUE;
5722
5723 /* Unset override-flag unconditionally. */
5724 UNSET_FLAG(peer->filter_override[afi][safi][direct],
5725 PEER_FT_PREFIX_LIST);
5726
5727 /* Inherit configuration from peer-group if peer is member. */
5728 if (peer_group_active(peer)) {
5729 PEER_STR_ATTR_INHERIT(peer, peer->group,
5730 filter[afi][safi].plist[direct].name,
5731 MTYPE_BGP_FILTER_NAME);
5732 PEER_ATTR_INHERIT(peer, peer->group,
5733 filter[afi][safi].plist[direct].plist);
5734 } else {
5735 /* Otherwise remove configuration from peer. */
5736 filter = &peer->filter[afi][safi];
5737 if (filter->plist[direct].name)
5738 XFREE(MTYPE_BGP_FILTER_NAME,
5739 filter->plist[direct].name);
5740 filter->plist[direct].name = NULL;
5741 filter->plist[direct].plist = NULL;
5742 }
5743
5744 /* Check if handling a regular peer. */
5745 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5746 /* Process peer route updates. */
5747 peer_on_policy_change(peer, afi, safi,
5748 (direct == FILTER_OUT) ? 1 : 0);
5749
5750 /* Skip peer-group mechanics for regular peers. */
5751 return 0;
5752 }
5753
5754 /*
5755 * Remove configuration on all peer-group members, unless they are
5756 * explicitely overriding peer-group configuration.
5757 */
5758 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5759 /* Skip peers with overridden configuration. */
5760 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5761 PEER_FT_PREFIX_LIST))
5762 continue;
5763
5764 /* Remove configuration on peer-group member. */
5765 filter = &member->filter[afi][safi];
5766 if (filter->plist[direct].name)
5767 XFREE(MTYPE_BGP_FILTER_NAME,
5768 filter->plist[direct].name);
5769 filter->plist[direct].name = NULL;
5770 filter->plist[direct].plist = NULL;
5771
5772 /* Process peer route updates. */
5773 peer_on_policy_change(member, afi, safi,
5774 (direct == FILTER_OUT) ? 1 : 0);
5775 }
5776
5777 return 0;
5778 }
5779
5780 /* Update prefix-list list. */
5781 static void peer_prefix_list_update(struct prefix_list *plist)
5782 {
5783 struct listnode *mnode, *mnnode;
5784 struct listnode *node, *nnode;
5785 struct bgp *bgp;
5786 struct peer *peer;
5787 struct peer_group *group;
5788 struct bgp_filter *filter;
5789 afi_t afi;
5790 safi_t safi;
5791 int direct;
5792
5793 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
5794
5795 /*
5796 * Update the prefix-list on update groups.
5797 */
5798 update_group_policy_update(
5799 bgp, BGP_POLICY_PREFIX_LIST,
5800 plist ? prefix_list_name(plist) : NULL, 0, 0);
5801
5802 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
5803 FOREACH_AFI_SAFI (afi, safi) {
5804 filter = &peer->filter[afi][safi];
5805
5806 for (direct = FILTER_IN; direct < FILTER_MAX;
5807 direct++) {
5808 if (filter->plist[direct].name)
5809 filter->plist[direct]
5810 .plist = prefix_list_lookup(
5811 afi,
5812 filter->plist[direct]
5813 .name);
5814 else
5815 filter->plist[direct].plist =
5816 NULL;
5817 }
5818 }
5819 }
5820 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
5821 FOREACH_AFI_SAFI (afi, safi) {
5822 filter = &group->conf->filter[afi][safi];
5823
5824 for (direct = FILTER_IN; direct < FILTER_MAX;
5825 direct++) {
5826 if (filter->plist[direct].name)
5827 filter->plist[direct]
5828 .plist = prefix_list_lookup(
5829 afi,
5830 filter->plist[direct]
5831 .name);
5832 else
5833 filter->plist[direct].plist =
5834 NULL;
5835 }
5836 }
5837 }
5838 }
5839 }
5840
5841 int peer_aslist_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
5842 const char *name)
5843 {
5844 struct peer *member;
5845 struct bgp_filter *filter;
5846 struct listnode *node, *nnode;
5847
5848 if (direct != FILTER_IN && direct != FILTER_OUT)
5849 return BGP_ERR_INVALID_VALUE;
5850
5851 /* Set configuration on peer. */
5852 filter = &peer->filter[afi][safi];
5853 if (filter->aslist[direct].name)
5854 XFREE(MTYPE_BGP_FILTER_NAME, filter->aslist[direct].name);
5855 filter->aslist[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5856 filter->aslist[direct].aslist = as_list_lookup(name);
5857
5858 /* Check if handling a regular peer. */
5859 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5860 /* Set override-flag and process peer route updates. */
5861 SET_FLAG(peer->filter_override[afi][safi][direct],
5862 PEER_FT_FILTER_LIST);
5863 peer_on_policy_change(peer, afi, safi,
5864 (direct == FILTER_OUT) ? 1 : 0);
5865
5866 /* Skip peer-group mechanics for regular peers. */
5867 return 0;
5868 }
5869
5870 /*
5871 * Set configuration on all peer-group members, unless they are
5872 * explicitely overriding peer-group configuration.
5873 */
5874 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5875 /* Skip peers with overridden configuration. */
5876 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5877 PEER_FT_FILTER_LIST))
5878 continue;
5879
5880 /* Set configuration on peer-group member. */
5881 filter = &member->filter[afi][safi];
5882 if (filter->aslist[direct].name)
5883 XFREE(MTYPE_BGP_FILTER_NAME,
5884 filter->aslist[direct].name);
5885 filter->aslist[direct].name =
5886 XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
5887 filter->aslist[direct].aslist = as_list_lookup(name);
5888
5889 /* Process peer route updates. */
5890 peer_on_policy_change(member, afi, safi,
5891 (direct == FILTER_OUT) ? 1 : 0);
5892 }
5893
5894 return 0;
5895 }
5896
5897 int peer_aslist_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
5898 {
5899 struct peer *member;
5900 struct bgp_filter *filter;
5901 struct listnode *node, *nnode;
5902
5903 if (direct != FILTER_IN && direct != FILTER_OUT)
5904 return BGP_ERR_INVALID_VALUE;
5905
5906 /* Unset override-flag unconditionally. */
5907 UNSET_FLAG(peer->filter_override[afi][safi][direct],
5908 PEER_FT_FILTER_LIST);
5909
5910 /* Inherit configuration from peer-group if peer is member. */
5911 if (peer_group_active(peer)) {
5912 PEER_STR_ATTR_INHERIT(peer, peer->group,
5913 filter[afi][safi].aslist[direct].name,
5914 MTYPE_BGP_FILTER_NAME);
5915 PEER_ATTR_INHERIT(peer, peer->group,
5916 filter[afi][safi].aslist[direct].aslist);
5917 } else {
5918 /* Otherwise remove configuration from peer. */
5919 filter = &peer->filter[afi][safi];
5920 if (filter->aslist[direct].name)
5921 XFREE(MTYPE_BGP_FILTER_NAME,
5922 filter->aslist[direct].name);
5923 filter->aslist[direct].name = NULL;
5924 filter->aslist[direct].aslist = NULL;
5925 }
5926
5927 /* Check if handling a regular peer. */
5928 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
5929 /* Process peer route updates. */
5930 peer_on_policy_change(peer, afi, safi,
5931 (direct == FILTER_OUT) ? 1 : 0);
5932
5933 /* Skip peer-group mechanics for regular peers. */
5934 return 0;
5935 }
5936
5937 /*
5938 * Remove configuration on all peer-group members, unless they are
5939 * explicitely overriding peer-group configuration.
5940 */
5941 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
5942 /* Skip peers with overridden configuration. */
5943 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
5944 PEER_FT_FILTER_LIST))
5945 continue;
5946
5947 /* Remove configuration on peer-group member. */
5948 filter = &member->filter[afi][safi];
5949 if (filter->aslist[direct].name)
5950 XFREE(MTYPE_BGP_FILTER_NAME,
5951 filter->aslist[direct].name);
5952 filter->aslist[direct].name = NULL;
5953 filter->aslist[direct].aslist = NULL;
5954
5955 /* Process peer route updates. */
5956 peer_on_policy_change(member, afi, safi,
5957 (direct == FILTER_OUT) ? 1 : 0);
5958 }
5959
5960 return 0;
5961 }
5962
5963 static void peer_aslist_update(const char *aslist_name)
5964 {
5965 afi_t afi;
5966 safi_t safi;
5967 int direct;
5968 struct listnode *mnode, *mnnode;
5969 struct listnode *node, *nnode;
5970 struct bgp *bgp;
5971 struct peer *peer;
5972 struct peer_group *group;
5973 struct bgp_filter *filter;
5974
5975 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
5976 update_group_policy_update(bgp, BGP_POLICY_FILTER_LIST,
5977 aslist_name, 0, 0);
5978
5979 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
5980 FOREACH_AFI_SAFI (afi, safi) {
5981 filter = &peer->filter[afi][safi];
5982
5983 for (direct = FILTER_IN; direct < FILTER_MAX;
5984 direct++) {
5985 if (filter->aslist[direct].name)
5986 filter->aslist[direct]
5987 .aslist = as_list_lookup(
5988 filter->aslist[direct]
5989 .name);
5990 else
5991 filter->aslist[direct].aslist =
5992 NULL;
5993 }
5994 }
5995 }
5996 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
5997 FOREACH_AFI_SAFI (afi, safi) {
5998 filter = &group->conf->filter[afi][safi];
5999
6000 for (direct = FILTER_IN; direct < FILTER_MAX;
6001 direct++) {
6002 if (filter->aslist[direct].name)
6003 filter->aslist[direct]
6004 .aslist = as_list_lookup(
6005 filter->aslist[direct]
6006 .name);
6007 else
6008 filter->aslist[direct].aslist =
6009 NULL;
6010 }
6011 }
6012 }
6013 }
6014 }
6015
6016 static void peer_aslist_add(char *aslist_name)
6017 {
6018 peer_aslist_update(aslist_name);
6019 route_map_notify_dependencies((char *)aslist_name,
6020 RMAP_EVENT_ASLIST_ADDED);
6021 }
6022
6023 static void peer_aslist_del(const char *aslist_name)
6024 {
6025 peer_aslist_update(aslist_name);
6026 route_map_notify_dependencies(aslist_name, RMAP_EVENT_ASLIST_DELETED);
6027 }
6028
6029
6030 int peer_route_map_set(struct peer *peer, afi_t afi, safi_t safi, int direct,
6031 const char *name, struct route_map *route_map)
6032 {
6033 struct peer *member;
6034 struct bgp_filter *filter;
6035 struct listnode *node, *nnode;
6036
6037 if (direct != RMAP_IN && direct != RMAP_OUT)
6038 return BGP_ERR_INVALID_VALUE;
6039
6040 /* Set configuration on peer. */
6041 filter = &peer->filter[afi][safi];
6042 if (filter->map[direct].name)
6043 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6044 filter->map[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6045 filter->map[direct].map = route_map;
6046
6047 /* Check if handling a regular peer. */
6048 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6049 /* Set override-flag and process peer route updates. */
6050 SET_FLAG(peer->filter_override[afi][safi][direct],
6051 PEER_FT_ROUTE_MAP);
6052 peer_on_policy_change(peer, afi, safi,
6053 (direct == RMAP_OUT) ? 1 : 0);
6054
6055 /* Skip peer-group mechanics for regular peers. */
6056 return 0;
6057 }
6058
6059 /*
6060 * Set configuration on all peer-group members, unless they are
6061 * explicitely overriding peer-group configuration.
6062 */
6063 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6064 /* Skip peers with overridden configuration. */
6065 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6066 PEER_FT_ROUTE_MAP))
6067 continue;
6068
6069 /* Set configuration on peer-group member. */
6070 filter = &member->filter[afi][safi];
6071 if (filter->map[direct].name)
6072 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6073 filter->map[direct].name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6074 filter->map[direct].map = route_map;
6075
6076 /* Process peer route updates. */
6077 peer_on_policy_change(member, afi, safi,
6078 (direct == RMAP_OUT) ? 1 : 0);
6079 }
6080 return 0;
6081 }
6082
6083 /* Unset route-map from the peer. */
6084 int peer_route_map_unset(struct peer *peer, afi_t afi, safi_t safi, int direct)
6085 {
6086 struct peer *member;
6087 struct bgp_filter *filter;
6088 struct listnode *node, *nnode;
6089
6090 if (direct != RMAP_IN && direct != RMAP_OUT)
6091 return BGP_ERR_INVALID_VALUE;
6092
6093 /* Unset override-flag unconditionally. */
6094 UNSET_FLAG(peer->filter_override[afi][safi][direct], PEER_FT_ROUTE_MAP);
6095
6096 /* Inherit configuration from peer-group if peer is member. */
6097 if (peer_group_active(peer)) {
6098 PEER_STR_ATTR_INHERIT(peer, peer->group,
6099 filter[afi][safi].map[direct].name,
6100 MTYPE_BGP_FILTER_NAME);
6101 PEER_ATTR_INHERIT(peer, peer->group,
6102 filter[afi][safi].map[direct].map);
6103 } else {
6104 /* Otherwise remove configuration from peer. */
6105 filter = &peer->filter[afi][safi];
6106 if (filter->map[direct].name)
6107 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6108 filter->map[direct].name = NULL;
6109 filter->map[direct].map = NULL;
6110 }
6111
6112 /* Check if handling a regular peer. */
6113 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6114 /* Process peer route updates. */
6115 peer_on_policy_change(peer, afi, safi,
6116 (direct == RMAP_OUT) ? 1 : 0);
6117
6118 /* Skip peer-group mechanics for regular peers. */
6119 return 0;
6120 }
6121
6122 /*
6123 * Remove configuration on all peer-group members, unless they are
6124 * explicitely overriding peer-group configuration.
6125 */
6126 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6127 /* Skip peers with overridden configuration. */
6128 if (CHECK_FLAG(member->filter_override[afi][safi][direct],
6129 PEER_FT_ROUTE_MAP))
6130 continue;
6131
6132 /* Remove configuration on peer-group member. */
6133 filter = &member->filter[afi][safi];
6134 if (filter->map[direct].name)
6135 XFREE(MTYPE_BGP_FILTER_NAME, filter->map[direct].name);
6136 filter->map[direct].name = NULL;
6137 filter->map[direct].map = NULL;
6138
6139 /* Process peer route updates. */
6140 peer_on_policy_change(member, afi, safi,
6141 (direct == RMAP_OUT) ? 1 : 0);
6142 }
6143
6144 return 0;
6145 }
6146
6147 /* Set unsuppress-map to the peer. */
6148 int peer_unsuppress_map_set(struct peer *peer, afi_t afi, safi_t safi,
6149 const char *name, struct route_map *route_map)
6150 {
6151 struct peer *member;
6152 struct bgp_filter *filter;
6153 struct listnode *node, *nnode;
6154
6155 /* Set configuration on peer. */
6156 filter = &peer->filter[afi][safi];
6157 if (filter->usmap.name)
6158 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6159 filter->usmap.name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6160 filter->usmap.map = route_map;
6161
6162 /* Check if handling a regular peer. */
6163 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6164 /* Set override-flag and process peer route updates. */
6165 SET_FLAG(peer->filter_override[afi][safi][0],
6166 PEER_FT_UNSUPPRESS_MAP);
6167 peer_on_policy_change(peer, afi, safi, 1);
6168
6169 /* Skip peer-group mechanics for regular peers. */
6170 return 0;
6171 }
6172
6173 /*
6174 * Set configuration on all peer-group members, unless they are
6175 * explicitely overriding peer-group configuration.
6176 */
6177 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6178 /* Skip peers with overridden configuration. */
6179 if (CHECK_FLAG(member->filter_override[afi][safi][0],
6180 PEER_FT_UNSUPPRESS_MAP))
6181 continue;
6182
6183 /* Set configuration on peer-group member. */
6184 filter = &member->filter[afi][safi];
6185 if (filter->usmap.name)
6186 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6187 filter->usmap.name = XSTRDUP(MTYPE_BGP_FILTER_NAME, name);
6188 filter->usmap.map = route_map;
6189
6190 /* Process peer route updates. */
6191 peer_on_policy_change(member, afi, safi, 1);
6192 }
6193
6194 return 0;
6195 }
6196
6197 /* Unset route-map from the peer. */
6198 int peer_unsuppress_map_unset(struct peer *peer, afi_t afi, safi_t safi)
6199 {
6200 struct peer *member;
6201 struct bgp_filter *filter;
6202 struct listnode *node, *nnode;
6203
6204 /* Unset override-flag unconditionally. */
6205 UNSET_FLAG(peer->filter_override[afi][safi][0], PEER_FT_UNSUPPRESS_MAP);
6206
6207 /* Inherit configuration from peer-group if peer is member. */
6208 if (peer_group_active(peer)) {
6209 PEER_STR_ATTR_INHERIT(peer, peer->group,
6210 filter[afi][safi].usmap.name,
6211 MTYPE_BGP_FILTER_NAME);
6212 PEER_ATTR_INHERIT(peer, peer->group,
6213 filter[afi][safi].usmap.map);
6214 } else {
6215 /* Otherwise remove configuration from peer. */
6216 filter = &peer->filter[afi][safi];
6217 if (filter->usmap.name)
6218 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6219 filter->usmap.name = NULL;
6220 filter->usmap.map = NULL;
6221 }
6222
6223 /* Check if handling a regular peer. */
6224 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6225 /* Process peer route updates. */
6226 peer_on_policy_change(peer, afi, safi, 1);
6227
6228 /* Skip peer-group mechanics for regular peers. */
6229 return 0;
6230 }
6231
6232 /*
6233 * Remove configuration on all peer-group members, unless they are
6234 * explicitely overriding peer-group configuration.
6235 */
6236 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6237 /* Skip peers with overridden configuration. */
6238 if (CHECK_FLAG(member->filter_override[afi][safi][0],
6239 PEER_FT_UNSUPPRESS_MAP))
6240 continue;
6241
6242 /* Remove configuration on peer-group member. */
6243 filter = &member->filter[afi][safi];
6244 if (filter->usmap.name)
6245 XFREE(MTYPE_BGP_FILTER_NAME, filter->usmap.name);
6246 filter->usmap.name = NULL;
6247 filter->usmap.map = NULL;
6248
6249 /* Process peer route updates. */
6250 peer_on_policy_change(member, afi, safi, 1);
6251 }
6252
6253 return 0;
6254 }
6255
6256 int peer_maximum_prefix_set(struct peer *peer, afi_t afi, safi_t safi,
6257 uint32_t max, uint8_t threshold, int warning,
6258 uint16_t restart)
6259 {
6260 struct peer *member;
6261 struct listnode *node, *nnode;
6262
6263 /* Set flags and configuration on peer. */
6264 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
6265 if (warning)
6266 peer_af_flag_set(peer, afi, safi, PEER_FLAG_MAX_PREFIX_WARNING);
6267 else
6268 peer_af_flag_unset(peer, afi, safi,
6269 PEER_FLAG_MAX_PREFIX_WARNING);
6270
6271 peer->pmax[afi][safi] = max;
6272 peer->pmax_threshold[afi][safi] = threshold;
6273 peer->pmax_restart[afi][safi] = restart;
6274
6275 /* Check if handling a regular peer. */
6276 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6277 /* Re-check if peer violates maximum-prefix. */
6278 if ((peer->status == Established) && (peer->afc[afi][safi]))
6279 bgp_maximum_prefix_overflow(peer, afi, safi, 1);
6280
6281 /* Skip peer-group mechanics for regular peers. */
6282 return 0;
6283 }
6284
6285 /*
6286 * Set flags and configuration on all peer-group members, unless they
6287 * are explicitely overriding peer-group configuration.
6288 */
6289 for (ALL_LIST_ELEMENTS(peer->group->peer, node, nnode, member)) {
6290 /* Skip peers with overridden configuration. */
6291 if (CHECK_FLAG(member->af_flags_override[afi][safi],
6292 PEER_FLAG_MAX_PREFIX))
6293 continue;
6294
6295 /* Set flag and configuration on peer-group member. */
6296 member->pmax[afi][safi] = max;
6297 member->pmax_threshold[afi][safi] = threshold;
6298 member->pmax_restart[afi][safi] = restart;
6299 if (warning)
6300 SET_FLAG(member->af_flags[afi][safi],
6301 PEER_FLAG_MAX_PREFIX_WARNING);
6302 else
6303 UNSET_FLAG(member->af_flags[afi][safi],
6304 PEER_FLAG_MAX_PREFIX_WARNING);
6305
6306 /* Re-check if peer violates maximum-prefix. */
6307 if ((member->status == Established) && (member->afc[afi][safi]))
6308 bgp_maximum_prefix_overflow(member, afi, safi, 1);
6309 }
6310
6311 return 0;
6312 }
6313
6314 int peer_maximum_prefix_unset(struct peer *peer, afi_t afi, safi_t safi)
6315 {
6316 /* Inherit configuration from peer-group if peer is member. */
6317 if (peer_group_active(peer)) {
6318 peer_af_flag_inherit(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
6319 peer_af_flag_inherit(peer, afi, safi,
6320 PEER_FLAG_MAX_PREFIX_WARNING);
6321 PEER_ATTR_INHERIT(peer, peer->group, pmax[afi][safi]);
6322 PEER_ATTR_INHERIT(peer, peer->group, pmax_threshold[afi][safi]);
6323 PEER_ATTR_INHERIT(peer, peer->group, pmax_restart[afi][safi]);
6324
6325 return 0;
6326 }
6327
6328 /* Remove flags and configuration from peer. */
6329 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX);
6330 peer_af_flag_unset(peer, afi, safi, PEER_FLAG_MAX_PREFIX_WARNING);
6331 peer->pmax[afi][safi] = 0;
6332 peer->pmax_threshold[afi][safi] = 0;
6333 peer->pmax_restart[afi][safi] = 0;
6334
6335 /*
6336 * Remove flags and configuration from all peer-group members, unless
6337 * they are explicitely overriding peer-group configuration.
6338 */
6339 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6340 struct peer *member;
6341 struct listnode *node;
6342
6343 for (ALL_LIST_ELEMENTS_RO(peer->group->peer, node, member)) {
6344 /* Skip peers with overridden configuration. */
6345 if (CHECK_FLAG(member->af_flags_override[afi][safi],
6346 PEER_FLAG_MAX_PREFIX))
6347 continue;
6348
6349 /* Remove flag and configuration on peer-group member.
6350 */
6351 UNSET_FLAG(member->af_flags[afi][safi],
6352 PEER_FLAG_MAX_PREFIX);
6353 UNSET_FLAG(member->af_flags[afi][safi],
6354 PEER_FLAG_MAX_PREFIX_WARNING);
6355 member->pmax[afi][safi] = 0;
6356 member->pmax_threshold[afi][safi] = 0;
6357 member->pmax_restart[afi][safi] = 0;
6358 }
6359 }
6360
6361 return 0;
6362 }
6363
6364 int is_ebgp_multihop_configured(struct peer *peer)
6365 {
6366 struct peer_group *group;
6367 struct listnode *node, *nnode;
6368 struct peer *peer1;
6369
6370 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6371 group = peer->group;
6372 if ((peer_sort(peer) != BGP_PEER_IBGP)
6373 && (group->conf->ttl != 1))
6374 return 1;
6375
6376 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer1)) {
6377 if ((peer_sort(peer1) != BGP_PEER_IBGP)
6378 && (peer1->ttl != 1))
6379 return 1;
6380 }
6381 } else {
6382 if ((peer_sort(peer) != BGP_PEER_IBGP) && (peer->ttl != 1))
6383 return 1;
6384 }
6385 return 0;
6386 }
6387
6388 /* Set # of hops between us and BGP peer. */
6389 int peer_ttl_security_hops_set(struct peer *peer, int gtsm_hops)
6390 {
6391 struct peer_group *group;
6392 struct listnode *node, *nnode;
6393 int ret;
6394
6395 zlog_debug("peer_ttl_security_hops_set: set gtsm_hops to %d for %s",
6396 gtsm_hops, peer->host);
6397
6398 /* We cannot configure ttl-security hops when ebgp-multihop is already
6399 set. For non peer-groups, the check is simple. For peer-groups,
6400 it's
6401 slightly messy, because we need to check both the peer-group
6402 structure
6403 and all peer-group members for any trace of ebgp-multihop
6404 configuration
6405 before actually applying the ttl-security rules. Cisco really made a
6406 mess of this configuration parameter, and OpenBGPD got it right.
6407 */
6408
6409 if ((peer->gtsm_hops == 0) && (peer->sort != BGP_PEER_IBGP)) {
6410 if (is_ebgp_multihop_configured(peer))
6411 return BGP_ERR_NO_EBGP_MULTIHOP_WITH_TTLHACK;
6412
6413 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6414 peer->gtsm_hops = gtsm_hops;
6415
6416 /* Calling ebgp multihop also resets the session.
6417 * On restart, NHT will get setup correctly as will the
6418 * min & max ttls on the socket. The return value is
6419 * irrelevant.
6420 */
6421 ret = peer_ebgp_multihop_set(peer, MAXTTL);
6422
6423 if (ret != 0)
6424 return ret;
6425 } else {
6426 group = peer->group;
6427 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
6428 peer)) {
6429 peer->gtsm_hops = group->conf->gtsm_hops;
6430
6431 /* Calling ebgp multihop also resets the
6432 * session.
6433 * On restart, NHT will get setup correctly as
6434 * will the
6435 * min & max ttls on the socket. The return
6436 * value is
6437 * irrelevant.
6438 */
6439 peer_ebgp_multihop_set(peer, MAXTTL);
6440 }
6441 }
6442 } else {
6443 /* Post the first gtsm setup or if its ibgp, maxttl setting
6444 * isn't
6445 * necessary, just set the minttl.
6446 */
6447 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6448 peer->gtsm_hops = gtsm_hops;
6449
6450 if (peer->fd >= 0)
6451 sockopt_minttl(peer->su.sa.sa_family, peer->fd,
6452 MAXTTL + 1 - gtsm_hops);
6453 if ((peer->status < Established) && peer->doppelganger
6454 && (peer->doppelganger->fd >= 0))
6455 sockopt_minttl(peer->su.sa.sa_family,
6456 peer->doppelganger->fd,
6457 MAXTTL + 1 - gtsm_hops);
6458 } else {
6459 group = peer->group;
6460 for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
6461 peer)) {
6462 peer->gtsm_hops = group->conf->gtsm_hops;
6463
6464 /* Change setting of existing peer
6465 * established then change value (may break
6466 * connectivity)
6467 * not established yet (teardown session and
6468 * restart)
6469 * no session then do nothing (will get
6470 * handled by next connection)
6471 */
6472 if (peer->fd >= 0 && peer->gtsm_hops != 0)
6473 sockopt_minttl(
6474 peer->su.sa.sa_family, peer->fd,
6475 MAXTTL + 1 - peer->gtsm_hops);
6476 if ((peer->status < Established)
6477 && peer->doppelganger
6478 && (peer->doppelganger->fd >= 0))
6479 sockopt_minttl(peer->su.sa.sa_family,
6480 peer->doppelganger->fd,
6481 MAXTTL + 1 - gtsm_hops);
6482 }
6483 }
6484 }
6485
6486 return 0;
6487 }
6488
6489 int peer_ttl_security_hops_unset(struct peer *peer)
6490 {
6491 struct peer_group *group;
6492 struct listnode *node, *nnode;
6493 int ret = 0;
6494
6495 zlog_debug("peer_ttl_security_hops_unset: set gtsm_hops to zero for %s",
6496 peer->host);
6497
6498 /* if a peer-group member, then reset to peer-group default rather than
6499 * 0 */
6500 if (peer_group_active(peer))
6501 peer->gtsm_hops = peer->group->conf->gtsm_hops;
6502 else
6503 peer->gtsm_hops = 0;
6504
6505 if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6506 /* Invoking ebgp_multihop_set will set the TTL back to the
6507 * original
6508 * value as well as restting the NHT and such. The session is
6509 * reset.
6510 */
6511 if (peer->sort == BGP_PEER_EBGP)
6512 ret = peer_ebgp_multihop_unset(peer);
6513 else {
6514 if (peer->fd >= 0)
6515 sockopt_minttl(peer->su.sa.sa_family, peer->fd,
6516 0);
6517
6518 if ((peer->status < Established) && peer->doppelganger
6519 && (peer->doppelganger->fd >= 0))
6520 sockopt_minttl(peer->su.sa.sa_family,
6521 peer->doppelganger->fd, 0);
6522 }
6523 } else {
6524 group = peer->group;
6525 for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
6526 peer->gtsm_hops = 0;
6527 if (peer->sort == BGP_PEER_EBGP)
6528 ret = peer_ebgp_multihop_unset(peer);
6529 else {
6530 if (peer->fd >= 0)
6531 sockopt_minttl(peer->su.sa.sa_family,
6532 peer->fd, 0);
6533
6534 if ((peer->status < Established)
6535 && peer->doppelganger
6536 && (peer->doppelganger->fd >= 0))
6537 sockopt_minttl(peer->su.sa.sa_family,
6538 peer->doppelganger->fd,
6539 0);
6540 }
6541 }
6542 }
6543
6544 return ret;
6545 }
6546
6547 /*
6548 * If peer clear is invoked in a loop for all peers on the BGP instance,
6549 * it may end up freeing the doppelganger, and if this was the next node
6550 * to the current node, we would end up accessing the freed next node.
6551 * Pass along additional parameter which can be updated if next node
6552 * is freed; only required when walking the peer list on BGP instance.
6553 */
6554 int peer_clear(struct peer *peer, struct listnode **nnode)
6555 {
6556 if (!CHECK_FLAG(peer->flags, PEER_FLAG_SHUTDOWN)) {
6557 if (CHECK_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW)) {
6558 UNSET_FLAG(peer->sflags, PEER_STATUS_PREFIX_OVERFLOW);
6559 if (peer->t_pmax_restart) {
6560 BGP_TIMER_OFF(peer->t_pmax_restart);
6561 if (bgp_debug_neighbor_events(peer))
6562 zlog_debug(
6563 "%s Maximum-prefix restart timer canceled",
6564 peer->host);
6565 }
6566 BGP_EVENT_ADD(peer, BGP_Start);
6567 return 0;
6568 }
6569
6570 peer->v_start = BGP_INIT_START_TIMER;
6571 if (BGP_IS_VALID_STATE_FOR_NOTIF(peer->status))
6572 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
6573 BGP_NOTIFY_CEASE_ADMIN_RESET);
6574 else
6575 bgp_session_reset_safe(peer, nnode);
6576 }
6577 return 0;
6578 }
6579
6580 int peer_clear_soft(struct peer *peer, afi_t afi, safi_t safi,
6581 enum bgp_clear_type stype)
6582 {
6583 struct peer_af *paf;
6584
6585 if (peer->status != Established)
6586 return 0;
6587
6588 if (!peer->afc[afi][safi])
6589 return BGP_ERR_AF_UNCONFIGURED;
6590
6591 peer->rtt = sockopt_tcp_rtt(peer->fd);
6592
6593 if (stype == BGP_CLEAR_SOFT_OUT || stype == BGP_CLEAR_SOFT_BOTH) {
6594 /* Clear the "neighbor x.x.x.x default-originate" flag */
6595 paf = peer_af_find(peer, afi, safi);
6596 if (paf && paf->subgroup
6597 && CHECK_FLAG(paf->subgroup->sflags,
6598 SUBGRP_STATUS_DEFAULT_ORIGINATE))
6599 UNSET_FLAG(paf->subgroup->sflags,
6600 SUBGRP_STATUS_DEFAULT_ORIGINATE);
6601
6602 bgp_announce_route(peer, afi, safi);
6603 }
6604
6605 if (stype == BGP_CLEAR_SOFT_IN_ORF_PREFIX) {
6606 if (CHECK_FLAG(peer->af_cap[afi][safi],
6607 PEER_CAP_ORF_PREFIX_SM_ADV)
6608 && (CHECK_FLAG(peer->af_cap[afi][safi],
6609 PEER_CAP_ORF_PREFIX_RM_RCV)
6610 || CHECK_FLAG(peer->af_cap[afi][safi],
6611 PEER_CAP_ORF_PREFIX_RM_OLD_RCV))) {
6612 struct bgp_filter *filter = &peer->filter[afi][safi];
6613 uint8_t prefix_type;
6614
6615 if (CHECK_FLAG(peer->af_cap[afi][safi],
6616 PEER_CAP_ORF_PREFIX_RM_RCV))
6617 prefix_type = ORF_TYPE_PREFIX;
6618 else
6619 prefix_type = ORF_TYPE_PREFIX_OLD;
6620
6621 if (filter->plist[FILTER_IN].plist) {
6622 if (CHECK_FLAG(peer->af_sflags[afi][safi],
6623 PEER_STATUS_ORF_PREFIX_SEND))
6624 bgp_route_refresh_send(
6625 peer, afi, safi, prefix_type,
6626 REFRESH_DEFER, 1);
6627 bgp_route_refresh_send(peer, afi, safi,
6628 prefix_type,
6629 REFRESH_IMMEDIATE, 0);
6630 } else {
6631 if (CHECK_FLAG(peer->af_sflags[afi][safi],
6632 PEER_STATUS_ORF_PREFIX_SEND))
6633 bgp_route_refresh_send(
6634 peer, afi, safi, prefix_type,
6635 REFRESH_IMMEDIATE, 1);
6636 else
6637 bgp_route_refresh_send(peer, afi, safi,
6638 0, 0, 0);
6639 }
6640 return 0;
6641 }
6642 }
6643
6644 if (stype == BGP_CLEAR_SOFT_IN || stype == BGP_CLEAR_SOFT_BOTH
6645 || stype == BGP_CLEAR_SOFT_IN_ORF_PREFIX) {
6646 /* If neighbor has soft reconfiguration inbound flag.
6647 Use Adj-RIB-In database. */
6648 if (CHECK_FLAG(peer->af_flags[afi][safi],
6649 PEER_FLAG_SOFT_RECONFIG))
6650 bgp_soft_reconfig_in(peer, afi, safi);
6651 else {
6652 /* If neighbor has route refresh capability, send route
6653 refresh
6654 message to the peer. */
6655 if (CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_OLD_RCV)
6656 || CHECK_FLAG(peer->cap, PEER_CAP_REFRESH_NEW_RCV))
6657 bgp_route_refresh_send(peer, afi, safi, 0, 0,
6658 0);
6659 else
6660 return BGP_ERR_SOFT_RECONFIG_UNCONFIGURED;
6661 }
6662 }
6663 return 0;
6664 }
6665
6666 /* Display peer uptime.*/
6667 char *peer_uptime(time_t uptime2, char *buf, size_t len, bool use_json,
6668 json_object *json)
6669 {
6670 time_t uptime1, epoch_tbuf;
6671 struct tm *tm;
6672
6673 /* If there is no connection has been done before print `never'. */
6674 if (uptime2 == 0) {
6675 if (use_json) {
6676 json_object_string_add(json, "peerUptime", "never");
6677 json_object_int_add(json, "peerUptimeMsec", 0);
6678 } else
6679 snprintf(buf, len, "never");
6680 return buf;
6681 }
6682
6683 /* Get current time. */
6684 uptime1 = bgp_clock();
6685 uptime1 -= uptime2;
6686 tm = gmtime(&uptime1);
6687
6688 if (uptime1 < ONE_DAY_SECOND)
6689 snprintf(buf, len, "%02d:%02d:%02d", tm->tm_hour, tm->tm_min,
6690 tm->tm_sec);
6691 else if (uptime1 < ONE_WEEK_SECOND)
6692 snprintf(buf, len, "%dd%02dh%02dm", tm->tm_yday, tm->tm_hour,
6693 tm->tm_min);
6694 else if (uptime1 < ONE_YEAR_SECOND)
6695 snprintf(buf, len, "%02dw%dd%02dh", tm->tm_yday / 7,
6696 tm->tm_yday - ((tm->tm_yday / 7) * 7), tm->tm_hour);
6697 else
6698 snprintf(buf, len, "%02dy%02dw%dd", tm->tm_year - 70,
6699 tm->tm_yday / 7,
6700 tm->tm_yday - ((tm->tm_yday / 7) * 7));
6701
6702 if (use_json) {
6703 epoch_tbuf = time(NULL) - uptime1;
6704 json_object_string_add(json, "peerUptime", buf);
6705 json_object_int_add(json, "peerUptimeMsec", uptime1 * 1000);
6706 json_object_int_add(json, "peerUptimeEstablishedEpoch",
6707 epoch_tbuf);
6708 }
6709
6710 return buf;
6711 }
6712
6713 static void bgp_config_write_filter(struct vty *vty, struct peer *peer,
6714 afi_t afi, safi_t safi)
6715 {
6716 struct bgp_filter *filter;
6717 char *addr;
6718
6719 addr = peer->host;
6720 filter = &peer->filter[afi][safi];
6721
6722 /* distribute-list. */
6723 if (peergroup_filter_check(peer, afi, safi, PEER_FT_DISTRIBUTE_LIST,
6724 FILTER_IN))
6725 vty_out(vty, " neighbor %s distribute-list %s in\n", addr,
6726 filter->dlist[FILTER_IN].name);
6727
6728 if (peergroup_filter_check(peer, afi, safi, PEER_FT_DISTRIBUTE_LIST,
6729 FILTER_OUT))
6730 vty_out(vty, " neighbor %s distribute-list %s out\n", addr,
6731 filter->dlist[FILTER_OUT].name);
6732
6733 /* prefix-list. */
6734 if (peergroup_filter_check(peer, afi, safi, PEER_FT_PREFIX_LIST,
6735 FILTER_IN))
6736 vty_out(vty, " neighbor %s prefix-list %s in\n", addr,
6737 filter->plist[FILTER_IN].name);
6738
6739 if (peergroup_filter_check(peer, afi, safi, PEER_FT_PREFIX_LIST,
6740 FILTER_OUT))
6741 vty_out(vty, " neighbor %s prefix-list %s out\n", addr,
6742 filter->plist[FILTER_OUT].name);
6743
6744 /* route-map. */
6745 if (peergroup_filter_check(peer, afi, safi, PEER_FT_ROUTE_MAP, RMAP_IN))
6746 vty_out(vty, " neighbor %s route-map %s in\n", addr,
6747 filter->map[RMAP_IN].name);
6748
6749 if (peergroup_filter_check(peer, afi, safi, PEER_FT_ROUTE_MAP,
6750 RMAP_OUT))
6751 vty_out(vty, " neighbor %s route-map %s out\n", addr,
6752 filter->map[RMAP_OUT].name);
6753
6754 /* unsuppress-map */
6755 if (peergroup_filter_check(peer, afi, safi, PEER_FT_UNSUPPRESS_MAP, 0))
6756 vty_out(vty, " neighbor %s unsuppress-map %s\n", addr,
6757 filter->usmap.name);
6758
6759 /* filter-list. */
6760 if (peergroup_filter_check(peer, afi, safi, PEER_FT_FILTER_LIST,
6761 FILTER_IN))
6762 vty_out(vty, " neighbor %s filter-list %s in\n", addr,
6763 filter->aslist[FILTER_IN].name);
6764
6765 if (peergroup_filter_check(peer, afi, safi, PEER_FT_FILTER_LIST,
6766 FILTER_OUT))
6767 vty_out(vty, " neighbor %s filter-list %s out\n", addr,
6768 filter->aslist[FILTER_OUT].name);
6769 }
6770
6771 /* BGP peer configuration display function. */
6772 static void bgp_config_write_peer_global(struct vty *vty, struct bgp *bgp,
6773 struct peer *peer)
6774 {
6775 struct peer *g_peer = NULL;
6776 char buf[SU_ADDRSTRLEN];
6777 char *addr;
6778 int if_pg_printed = FALSE;
6779 int if_ras_printed = FALSE;
6780
6781 /* Skip dynamic neighbors. */
6782 if (peer_dynamic_neighbor(peer))
6783 return;
6784
6785 if (peer->conf_if)
6786 addr = peer->conf_if;
6787 else
6788 addr = peer->host;
6789
6790 /************************************
6791 ****** Global to the neighbor ******
6792 ************************************/
6793 if (peer->conf_if) {
6794 if (CHECK_FLAG(peer->flags, PEER_FLAG_IFPEER_V6ONLY))
6795 vty_out(vty, " neighbor %s interface v6only", addr);
6796 else
6797 vty_out(vty, " neighbor %s interface", addr);
6798
6799 if (peer_group_active(peer)) {
6800 vty_out(vty, " peer-group %s", peer->group->name);
6801 if_pg_printed = TRUE;
6802 } else if (peer->as_type == AS_SPECIFIED) {
6803 vty_out(vty, " remote-as %u", peer->as);
6804 if_ras_printed = TRUE;
6805 } else if (peer->as_type == AS_INTERNAL) {
6806 vty_out(vty, " remote-as internal");
6807 if_ras_printed = TRUE;
6808 } else if (peer->as_type == AS_EXTERNAL) {
6809 vty_out(vty, " remote-as external");
6810 if_ras_printed = TRUE;
6811 }
6812
6813 vty_out(vty, "\n");
6814 }
6815
6816 /* remote-as and peer-group */
6817 /* peer is a member of a peer-group */
6818 if (peer_group_active(peer)) {
6819 g_peer = peer->group->conf;
6820
6821 if (g_peer->as_type == AS_UNSPECIFIED && !if_ras_printed) {
6822 if (peer->as_type == AS_SPECIFIED) {
6823 vty_out(vty, " neighbor %s remote-as %u\n",
6824 addr, peer->as);
6825 } else if (peer->as_type == AS_INTERNAL) {
6826 vty_out(vty,
6827 " neighbor %s remote-as internal\n",
6828 addr);
6829 } else if (peer->as_type == AS_EXTERNAL) {
6830 vty_out(vty,
6831 " neighbor %s remote-as external\n",
6832 addr);
6833 }
6834 }
6835
6836 /* For swpX peers we displayed the peer-group
6837 * via 'neighbor swpX interface peer-group WORD' */
6838 if (!if_pg_printed)
6839 vty_out(vty, " neighbor %s peer-group %s\n", addr,
6840 peer->group->name);
6841 }
6842
6843 /* peer is NOT a member of a peer-group */
6844 else {
6845 /* peer is a peer-group, declare the peer-group */
6846 if (CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
6847 vty_out(vty, " neighbor %s peer-group\n", addr);
6848 }
6849
6850 if (!if_ras_printed) {
6851 if (peer->as_type == AS_SPECIFIED) {
6852 vty_out(vty, " neighbor %s remote-as %u\n",
6853 addr, peer->as);
6854 } else if (peer->as_type == AS_INTERNAL) {
6855 vty_out(vty,
6856 " neighbor %s remote-as internal\n",
6857 addr);
6858 } else if (peer->as_type == AS_EXTERNAL) {
6859 vty_out(vty,
6860 " neighbor %s remote-as external\n",
6861 addr);
6862 }
6863 }
6864 }
6865
6866 /* local-as */
6867 if (peergroup_flag_check(peer, PEER_FLAG_LOCAL_AS)) {
6868 vty_out(vty, " neighbor %s local-as %u", addr,
6869 peer->change_local_as);
6870 if (peergroup_flag_check(peer, PEER_FLAG_LOCAL_AS_NO_PREPEND))
6871 vty_out(vty, " no-prepend");
6872 if (peergroup_flag_check(peer, PEER_FLAG_LOCAL_AS_REPLACE_AS))
6873 vty_out(vty, " replace-as");
6874 vty_out(vty, "\n");
6875 }
6876
6877 /* description */
6878 if (peer->desc) {
6879 vty_out(vty, " neighbor %s description %s\n", addr, peer->desc);
6880 }
6881
6882 /* shutdown */
6883 if (peergroup_flag_check(peer, PEER_FLAG_SHUTDOWN)) {
6884 if (peer->tx_shutdown_message)
6885 vty_out(vty, " neighbor %s shutdown message %s\n", addr,
6886 peer->tx_shutdown_message);
6887 else
6888 vty_out(vty, " neighbor %s shutdown\n", addr);
6889 }
6890
6891 /* bfd */
6892 if (peer->bfd_info) {
6893 if (!peer_group_active(peer) || !g_peer->bfd_info) {
6894 bgp_bfd_peer_config_write(vty, peer, addr);
6895 }
6896 }
6897
6898 /* password */
6899 if (peergroup_flag_check(peer, PEER_FLAG_PASSWORD))
6900 vty_out(vty, " neighbor %s password %s\n", addr,
6901 peer->password);
6902
6903 /* neighbor solo */
6904 if (CHECK_FLAG(peer->flags, PEER_FLAG_LONESOUL)) {
6905 if (!peer_group_active(peer)) {
6906 vty_out(vty, " neighbor %s solo\n", addr);
6907 }
6908 }
6909
6910 /* BGP port */
6911 if (peer->port != BGP_PORT_DEFAULT) {
6912 vty_out(vty, " neighbor %s port %d\n", addr, peer->port);
6913 }
6914
6915 /* Local interface name */
6916 if (peer->ifname) {
6917 vty_out(vty, " neighbor %s interface %s\n", addr, peer->ifname);
6918 }
6919
6920 /* passive */
6921 if (peergroup_flag_check(peer, PEER_FLAG_PASSIVE))
6922 vty_out(vty, " neighbor %s passive\n", addr);
6923
6924 /* ebgp-multihop */
6925 if (peer->sort != BGP_PEER_IBGP && peer->ttl != 1
6926 && !(peer->gtsm_hops != 0 && peer->ttl == MAXTTL)) {
6927 if (!peer_group_active(peer) || g_peer->ttl != peer->ttl) {
6928 vty_out(vty, " neighbor %s ebgp-multihop %d\n", addr,
6929 peer->ttl);
6930 }
6931 }
6932
6933 /* ttl-security hops */
6934 if (peer->gtsm_hops != 0) {
6935 if (!peer_group_active(peer)
6936 || g_peer->gtsm_hops != peer->gtsm_hops) {
6937 vty_out(vty, " neighbor %s ttl-security hops %d\n",
6938 addr, peer->gtsm_hops);
6939 }
6940 }
6941
6942 /* disable-connected-check */
6943 if (peergroup_flag_check(peer, PEER_FLAG_DISABLE_CONNECTED_CHECK))
6944 vty_out(vty, " neighbor %s disable-connected-check\n", addr);
6945
6946 /* enforce-first-as */
6947 if (peergroup_flag_check(peer, PEER_FLAG_ENFORCE_FIRST_AS))
6948 vty_out(vty, " neighbor %s enforce-first-as\n", addr);
6949
6950 /* update-source */
6951 if (peergroup_flag_check(peer, PEER_FLAG_UPDATE_SOURCE)) {
6952 if (peer->update_source)
6953 vty_out(vty, " neighbor %s update-source %s\n", addr,
6954 sockunion2str(peer->update_source, buf,
6955 SU_ADDRSTRLEN));
6956 else if (peer->update_if)
6957 vty_out(vty, " neighbor %s update-source %s\n", addr,
6958 peer->update_if);
6959 }
6960
6961 /* advertisement-interval */
6962 if (peergroup_flag_check(peer, PEER_FLAG_ROUTEADV))
6963 vty_out(vty, " neighbor %s advertisement-interval %u\n", addr,
6964 peer->routeadv);
6965
6966 /* timers */
6967 if (peergroup_flag_check(peer, PEER_FLAG_TIMER))
6968 vty_out(vty, " neighbor %s timers %u %u\n", addr,
6969 peer->keepalive, peer->holdtime);
6970
6971 /* timers connect */
6972 if (peergroup_flag_check(peer, PEER_FLAG_TIMER_CONNECT))
6973 vty_out(vty, " neighbor %s timers connect %u\n", addr,
6974 peer->connect);
6975
6976 /* capability dynamic */
6977 if (peergroup_flag_check(peer, PEER_FLAG_DYNAMIC_CAPABILITY))
6978 vty_out(vty, " neighbor %s capability dynamic\n", addr);
6979
6980 /* capability extended-nexthop */
6981 if (peergroup_flag_check(peer, PEER_FLAG_CAPABILITY_ENHE)) {
6982 if (CHECK_FLAG(peer->flags_invert, PEER_FLAG_CAPABILITY_ENHE))
6983 vty_out(vty,
6984 " no neighbor %s capability extended-nexthop\n",
6985 addr);
6986 else
6987 vty_out(vty,
6988 " neighbor %s capability extended-nexthop\n",
6989 addr);
6990 }
6991
6992 /* dont-capability-negotiation */
6993 if (peergroup_flag_check(peer, PEER_FLAG_DONT_CAPABILITY))
6994 vty_out(vty, " neighbor %s dont-capability-negotiate\n", addr);
6995
6996 /* override-capability */
6997 if (peergroup_flag_check(peer, PEER_FLAG_OVERRIDE_CAPABILITY))
6998 vty_out(vty, " neighbor %s override-capability\n", addr);
6999
7000 /* strict-capability-match */
7001 if (peergroup_flag_check(peer, PEER_FLAG_STRICT_CAP_MATCH))
7002 vty_out(vty, " neighbor %s strict-capability-match\n", addr);
7003 }
7004
7005 /* BGP peer configuration display function. */
7006 static void bgp_config_write_peer_af(struct vty *vty, struct bgp *bgp,
7007 struct peer *peer, afi_t afi, safi_t safi)
7008 {
7009 struct peer *g_peer = NULL;
7010 char *addr;
7011 bool flag_scomm, flag_secomm, flag_slcomm;
7012
7013 /* Skip dynamic neighbors. */
7014 if (peer_dynamic_neighbor(peer))
7015 return;
7016
7017 if (peer->conf_if)
7018 addr = peer->conf_if;
7019 else
7020 addr = peer->host;
7021
7022 /************************************
7023 ****** Per AF to the neighbor ******
7024 ************************************/
7025 if (peer_group_active(peer)) {
7026 g_peer = peer->group->conf;
7027
7028 /* If the peer-group is active but peer is not, print a 'no
7029 * activate' */
7030 if (g_peer->afc[afi][safi] && !peer->afc[afi][safi]) {
7031 vty_out(vty, " no neighbor %s activate\n", addr);
7032 }
7033
7034 /* If the peer-group is not active but peer is, print an
7035 'activate' */
7036 else if (!g_peer->afc[afi][safi] && peer->afc[afi][safi]) {
7037 vty_out(vty, " neighbor %s activate\n", addr);
7038 }
7039 } else {
7040 if (peer->afc[afi][safi]) {
7041 if ((afi == AFI_IP) && (safi == SAFI_UNICAST)) {
7042 if (bgp_flag_check(bgp,
7043 BGP_FLAG_NO_DEFAULT_IPV4)) {
7044 vty_out(vty, " neighbor %s activate\n",
7045 addr);
7046 }
7047 } else
7048 vty_out(vty, " neighbor %s activate\n", addr);
7049 } else {
7050 if ((afi == AFI_IP) && (safi == SAFI_UNICAST)) {
7051 if (!bgp_flag_check(bgp,
7052 BGP_FLAG_NO_DEFAULT_IPV4)) {
7053 vty_out(vty,
7054 " no neighbor %s activate\n",
7055 addr);
7056 }
7057 }
7058 }
7059 }
7060
7061 /* addpath TX knobs */
7062 if (peergroup_af_flag_check(peer, afi, safi,
7063 PEER_FLAG_ADDPATH_TX_ALL_PATHS)) {
7064 vty_out(vty, " neighbor %s addpath-tx-all-paths\n", addr);
7065 }
7066
7067 if (peergroup_af_flag_check(peer, afi, safi,
7068 PEER_FLAG_ADDPATH_TX_BESTPATH_PER_AS)) {
7069 vty_out(vty, " neighbor %s addpath-tx-bestpath-per-AS\n",
7070 addr);
7071 }
7072
7073 /* ORF capability. */
7074 if (peergroup_af_flag_check(peer, afi, safi, PEER_FLAG_ORF_PREFIX_SM)
7075 || peergroup_af_flag_check(peer, afi, safi,
7076 PEER_FLAG_ORF_PREFIX_RM)) {
7077 vty_out(vty, " neighbor %s capability orf prefix-list", addr);
7078
7079 if (peergroup_af_flag_check(peer, afi, safi,
7080 PEER_FLAG_ORF_PREFIX_SM)
7081 && peergroup_af_flag_check(peer, afi, safi,
7082 PEER_FLAG_ORF_PREFIX_RM))
7083 vty_out(vty, " both");
7084 else if (peergroup_af_flag_check(peer, afi, safi,
7085 PEER_FLAG_ORF_PREFIX_SM))
7086 vty_out(vty, " send");
7087 else
7088 vty_out(vty, " receive");
7089 vty_out(vty, "\n");
7090 }
7091
7092 /* Route reflector client. */
7093 if (peergroup_af_flag_check(peer, afi, safi,
7094 PEER_FLAG_REFLECTOR_CLIENT)) {
7095 vty_out(vty, " neighbor %s route-reflector-client\n", addr);
7096 }
7097
7098 /* next-hop-self force */
7099 if (peergroup_af_flag_check(peer, afi, safi,
7100 PEER_FLAG_FORCE_NEXTHOP_SELF)) {
7101 vty_out(vty, " neighbor %s next-hop-self force\n", addr);
7102 }
7103
7104 /* next-hop-self */
7105 if (peergroup_af_flag_check(peer, afi, safi, PEER_FLAG_NEXTHOP_SELF)) {
7106 vty_out(vty, " neighbor %s next-hop-self\n", addr);
7107 }
7108
7109 /* remove-private-AS */
7110 if (peergroup_af_flag_check(peer, afi, safi,
7111 PEER_FLAG_REMOVE_PRIVATE_AS_ALL_REPLACE)) {
7112 vty_out(vty, " neighbor %s remove-private-AS all replace-AS\n",
7113 addr);
7114 }
7115
7116 else if (peergroup_af_flag_check(peer, afi, safi,
7117 PEER_FLAG_REMOVE_PRIVATE_AS_REPLACE)) {
7118 vty_out(vty, " neighbor %s remove-private-AS replace-AS\n",
7119 addr);
7120 }
7121
7122 else if (peergroup_af_flag_check(peer, afi, safi,
7123 PEER_FLAG_REMOVE_PRIVATE_AS_ALL)) {
7124 vty_out(vty, " neighbor %s remove-private-AS all\n", addr);
7125 }
7126
7127 else if (peergroup_af_flag_check(peer, afi, safi,
7128 PEER_FLAG_REMOVE_PRIVATE_AS)) {
7129 vty_out(vty, " neighbor %s remove-private-AS\n", addr);
7130 }
7131
7132 /* as-override */
7133 if (peergroup_af_flag_check(peer, afi, safi, PEER_FLAG_AS_OVERRIDE)) {
7134 vty_out(vty, " neighbor %s as-override\n", addr);
7135 }
7136
7137 /* send-community print. */
7138 flag_scomm = peergroup_af_flag_check(peer, afi, safi,
7139 PEER_FLAG_SEND_COMMUNITY);
7140 flag_secomm = peergroup_af_flag_check(peer, afi, safi,
7141 PEER_FLAG_SEND_EXT_COMMUNITY);
7142 flag_slcomm = peergroup_af_flag_check(peer, afi, safi,
7143 PEER_FLAG_SEND_LARGE_COMMUNITY);
7144
7145 if (!bgp_option_check(BGP_OPT_CONFIG_CISCO)) {
7146 if (flag_scomm && flag_secomm && flag_slcomm) {
7147 vty_out(vty, " no neighbor %s send-community all\n",
7148 addr);
7149 } else {
7150 if (flag_scomm)
7151 vty_out(vty,
7152 " no neighbor %s send-community\n",
7153 addr);
7154 if (flag_secomm)
7155 vty_out(vty,
7156 " no neighbor %s send-community extended\n",
7157 addr);
7158
7159 if (flag_slcomm)
7160 vty_out(vty,
7161 " no neighbor %s send-community large\n",
7162 addr);
7163 }
7164 } else {
7165 if (flag_scomm && flag_secomm && flag_slcomm) {
7166 vty_out(vty, " neighbor %s send-community all\n",
7167 addr);
7168 } else if (flag_scomm && flag_secomm) {
7169 vty_out(vty, " neighbor %s send-community both\n",
7170 addr);
7171 } else {
7172 if (flag_scomm)
7173 vty_out(vty, " neighbor %s send-community\n",
7174 addr);
7175 if (flag_secomm)
7176 vty_out(vty,
7177 " neighbor %s send-community extended\n",
7178 addr);
7179 if (flag_slcomm)
7180 vty_out(vty,
7181 " neighbor %s send-community large\n",
7182 addr);
7183 }
7184 }
7185
7186 /* Default information */
7187 if (peergroup_af_flag_check(peer, afi, safi,
7188 PEER_FLAG_DEFAULT_ORIGINATE)) {
7189 vty_out(vty, " neighbor %s default-originate", addr);
7190
7191 if (peer->default_rmap[afi][safi].name)
7192 vty_out(vty, " route-map %s",
7193 peer->default_rmap[afi][safi].name);
7194
7195 vty_out(vty, "\n");
7196 }
7197
7198 /* Soft reconfiguration inbound. */
7199 if (peergroup_af_flag_check(peer, afi, safi, PEER_FLAG_SOFT_RECONFIG)) {
7200 vty_out(vty, " neighbor %s soft-reconfiguration inbound\n",
7201 addr);
7202 }
7203
7204 /* maximum-prefix. */
7205 if (peergroup_af_flag_check(peer, afi, safi, PEER_FLAG_MAX_PREFIX)) {
7206 vty_out(vty, " neighbor %s maximum-prefix %lu", addr,
7207 peer->pmax[afi][safi]);
7208
7209 if (peer->pmax_threshold[afi][safi]
7210 != MAXIMUM_PREFIX_THRESHOLD_DEFAULT)
7211 vty_out(vty, " %u", peer->pmax_threshold[afi][safi]);
7212 if (peer_af_flag_check(peer, afi, safi,
7213 PEER_FLAG_MAX_PREFIX_WARNING))
7214 vty_out(vty, " warning-only");
7215 if (peer->pmax_restart[afi][safi])
7216 vty_out(vty, " restart %u",
7217 peer->pmax_restart[afi][safi]);
7218
7219 vty_out(vty, "\n");
7220 }
7221
7222 /* Route server client. */
7223 if (peergroup_af_flag_check(peer, afi, safi,
7224 PEER_FLAG_RSERVER_CLIENT)) {
7225 vty_out(vty, " neighbor %s route-server-client\n", addr);
7226 }
7227
7228 /* Nexthop-local unchanged. */
7229 if (peergroup_af_flag_check(peer, afi, safi,
7230 PEER_FLAG_NEXTHOP_LOCAL_UNCHANGED)) {
7231 vty_out(vty, " neighbor %s nexthop-local unchanged\n", addr);
7232 }
7233
7234 /* allowas-in <1-10> */
7235 if (peergroup_af_flag_check(peer, afi, safi, PEER_FLAG_ALLOWAS_IN)) {
7236 if (peer_af_flag_check(peer, afi, safi,
7237 PEER_FLAG_ALLOWAS_IN_ORIGIN)) {
7238 vty_out(vty, " neighbor %s allowas-in origin\n", addr);
7239 } else if (peer->allowas_in[afi][safi] == 3) {
7240 vty_out(vty, " neighbor %s allowas-in\n", addr);
7241 } else {
7242 vty_out(vty, " neighbor %s allowas-in %d\n", addr,
7243 peer->allowas_in[afi][safi]);
7244 }
7245 }
7246
7247 /* weight */
7248 if (peergroup_af_flag_check(peer, afi, safi, PEER_FLAG_WEIGHT))
7249 vty_out(vty, " neighbor %s weight %lu\n", addr,
7250 peer->weight[afi][safi]);
7251
7252 /* Filter. */
7253 bgp_config_write_filter(vty, peer, afi, safi);
7254
7255 /* atribute-unchanged. */
7256 if (peer_af_flag_check(peer, afi, safi, PEER_FLAG_AS_PATH_UNCHANGED)
7257 || (safi != SAFI_EVPN
7258 && peer_af_flag_check(peer, afi, safi,
7259 PEER_FLAG_NEXTHOP_UNCHANGED))
7260 || peer_af_flag_check(peer, afi, safi, PEER_FLAG_MED_UNCHANGED)) {
7261
7262 if (!peer_group_active(peer)
7263 || peergroup_af_flag_check(peer, afi, safi,
7264 PEER_FLAG_AS_PATH_UNCHANGED)
7265 || peergroup_af_flag_check(peer, afi, safi,
7266 PEER_FLAG_NEXTHOP_UNCHANGED)
7267 || peergroup_af_flag_check(peer, afi, safi,
7268 PEER_FLAG_MED_UNCHANGED)) {
7269
7270 vty_out(vty,
7271 " neighbor %s attribute-unchanged%s%s%s\n",
7272 addr,
7273 peer_af_flag_check(peer, afi, safi,
7274 PEER_FLAG_AS_PATH_UNCHANGED)
7275 ? " as-path"
7276 : "",
7277 peer_af_flag_check(peer, afi, safi,
7278 PEER_FLAG_NEXTHOP_UNCHANGED)
7279 ? " next-hop"
7280 : "",
7281 peer_af_flag_check(peer, afi, safi,
7282 PEER_FLAG_MED_UNCHANGED)
7283 ? " med"
7284 : "");
7285 }
7286 }
7287 }
7288
7289 /* Address family based peer configuration display. */
7290 static void bgp_config_write_family(struct vty *vty, struct bgp *bgp, afi_t afi,
7291 safi_t safi)
7292 {
7293 struct peer *peer;
7294 struct peer_group *group;
7295 struct listnode *node, *nnode;
7296
7297
7298 vty_frame(vty, " !\n address-family ");
7299 if (afi == AFI_IP) {
7300 if (safi == SAFI_UNICAST)
7301 vty_frame(vty, "ipv4 unicast");
7302 else if (safi == SAFI_LABELED_UNICAST)
7303 vty_frame(vty, "ipv4 labeled-unicast");
7304 else if (safi == SAFI_MULTICAST)
7305 vty_frame(vty, "ipv4 multicast");
7306 else if (safi == SAFI_MPLS_VPN)
7307 vty_frame(vty, "ipv4 vpn");
7308 else if (safi == SAFI_ENCAP)
7309 vty_frame(vty, "ipv4 encap");
7310 else if (safi == SAFI_FLOWSPEC)
7311 vty_frame(vty, "ipv4 flowspec");
7312 } else if (afi == AFI_IP6) {
7313 if (safi == SAFI_UNICAST)
7314 vty_frame(vty, "ipv6 unicast");
7315 else if (safi == SAFI_LABELED_UNICAST)
7316 vty_frame(vty, "ipv6 labeled-unicast");
7317 else if (safi == SAFI_MULTICAST)
7318 vty_frame(vty, "ipv6 multicast");
7319 else if (safi == SAFI_MPLS_VPN)
7320 vty_frame(vty, "ipv6 vpn");
7321 else if (safi == SAFI_ENCAP)
7322 vty_frame(vty, "ipv6 encap");
7323 else if (safi == SAFI_FLOWSPEC)
7324 vty_frame(vty, "ipv6 flowspec");
7325 } else if (afi == AFI_L2VPN) {
7326 if (safi == SAFI_EVPN)
7327 vty_frame(vty, "l2vpn evpn");
7328 }
7329 vty_frame(vty, "\n");
7330
7331 bgp_config_write_distance(vty, bgp, afi, safi);
7332
7333 bgp_config_write_network(vty, bgp, afi, safi);
7334
7335 bgp_config_write_redistribute(vty, bgp, afi, safi);
7336
7337 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group))
7338 bgp_config_write_peer_af(vty, bgp, group->conf, afi, safi);
7339
7340 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
7341 /* Skip dynamic neighbors. */
7342 if (peer_dynamic_neighbor(peer))
7343 continue;
7344
7345 /* Do not display doppelganger peers */
7346 if (CHECK_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE))
7347 bgp_config_write_peer_af(vty, bgp, peer, afi, safi);
7348 }
7349
7350 bgp_config_write_maxpaths(vty, bgp, afi, safi);
7351 bgp_config_write_table_map(vty, bgp, afi, safi);
7352
7353 if (safi == SAFI_EVPN)
7354 bgp_config_write_evpn_info(vty, bgp, afi, safi);
7355
7356 if (safi == SAFI_FLOWSPEC)
7357 bgp_fs_config_write_pbr(vty, bgp, afi, safi);
7358
7359 if (safi == SAFI_UNICAST) {
7360 bgp_vpn_policy_config_write_afi(vty, bgp, afi);
7361 if (CHECK_FLAG(bgp->af_flags[afi][safi],
7362 BGP_CONFIG_VRF_TO_MPLSVPN_EXPORT)) {
7363
7364 vty_out(vty, " export vpn\n");
7365 }
7366 if (CHECK_FLAG(bgp->af_flags[afi][safi],
7367 BGP_CONFIG_MPLSVPN_TO_VRF_IMPORT)) {
7368
7369 vty_out(vty, " import vpn\n");
7370 }
7371 if (CHECK_FLAG(bgp->af_flags[afi][safi],
7372 BGP_CONFIG_VRF_TO_VRF_IMPORT)) {
7373 char *name;
7374
7375 for (ALL_LIST_ELEMENTS_RO(
7376 bgp->vpn_policy[afi].import_vrf, node,
7377 name))
7378 vty_out(vty, " import vrf %s\n", name);
7379 }
7380 }
7381
7382 vty_endframe(vty, " exit-address-family\n");
7383 }
7384
7385 /* clang-format off */
7386 #if CONFDATE > 20190517
7387 CPP_NOTICE("bgpd: remove 'bgp enforce-first-as' config migration from bgp_config_write")
7388 #endif
7389 /* clang-format on */
7390
7391 int bgp_config_write(struct vty *vty)
7392 {
7393 int write = 0;
7394 struct bgp *bgp;
7395 struct peer_group *group;
7396 struct peer *peer;
7397 struct listnode *node, *nnode;
7398 struct listnode *mnode, *mnnode;
7399
7400 /* BGP Multiple instance. */
7401 if (!bgp_option_check(BGP_OPT_MULTIPLE_INSTANCE)) {
7402 vty_out(vty, "no bgp multiple-instance\n");
7403 write++;
7404 }
7405
7406 /* BGP Config type. */
7407 if (bgp_option_check(BGP_OPT_CONFIG_CISCO)) {
7408 vty_out(vty, "bgp config-type cisco\n");
7409 write++;
7410 }
7411
7412 if (bm->rmap_update_timer != RMAP_DEFAULT_UPDATE_TIMER)
7413 vty_out(vty, "bgp route-map delay-timer %u\n",
7414 bm->rmap_update_timer);
7415
7416 if (write)
7417 vty_out(vty, "!\n");
7418
7419 /* BGP configuration. */
7420 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp)) {
7421
7422 /* skip all auto created vrf as they dont have user config */
7423 if (CHECK_FLAG(bgp->vrf_flags, BGP_VRF_AUTO))
7424 continue;
7425
7426 /* Migrate deprecated 'bgp enforce-first-as'
7427 * config to 'neighbor * enforce-first-as' configs
7428 */
7429 if (bgp_flag_check(bgp, BGP_FLAG_ENFORCE_FIRST_AS)) {
7430 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
7431 peer_flag_set(peer, PEER_FLAG_ENFORCE_FIRST_AS);
7432 bgp_flag_unset(bgp, BGP_FLAG_ENFORCE_FIRST_AS);
7433 }
7434
7435 /* Router bgp ASN */
7436 vty_out(vty, "router bgp %u", bgp->as);
7437
7438 if (bgp_option_check(BGP_OPT_MULTIPLE_INSTANCE)) {
7439 if (bgp->name)
7440 vty_out(vty, " %s %s",
7441 (bgp->inst_type
7442 == BGP_INSTANCE_TYPE_VIEW)
7443 ? "view"
7444 : "vrf",
7445 bgp->name);
7446 }
7447 vty_out(vty, "\n");
7448
7449 /* No Synchronization */
7450 if (bgp_option_check(BGP_OPT_CONFIG_CISCO))
7451 vty_out(vty, " no synchronization\n");
7452
7453 /* BGP fast-external-failover. */
7454 if (CHECK_FLAG(bgp->flags, BGP_FLAG_NO_FAST_EXT_FAILOVER))
7455 vty_out(vty, " no bgp fast-external-failover\n");
7456
7457 /* BGP router ID. */
7458 if (bgp->router_id_static.s_addr != 0)
7459 vty_out(vty, " bgp router-id %s\n",
7460 inet_ntoa(bgp->router_id_static));
7461
7462 /* BGP log-neighbor-changes. */
7463 if (!!bgp_flag_check(bgp, BGP_FLAG_LOG_NEIGHBOR_CHANGES)
7464 != DFLT_BGP_LOG_NEIGHBOR_CHANGES)
7465 vty_out(vty, " %sbgp log-neighbor-changes\n",
7466 bgp_flag_check(bgp,
7467 BGP_FLAG_LOG_NEIGHBOR_CHANGES)
7468 ? ""
7469 : "no ");
7470
7471 /* BGP configuration. */
7472 if (bgp_flag_check(bgp, BGP_FLAG_ALWAYS_COMPARE_MED))
7473 vty_out(vty, " bgp always-compare-med\n");
7474
7475 /* BGP default ipv4-unicast. */
7476 if (bgp_flag_check(bgp, BGP_FLAG_NO_DEFAULT_IPV4))
7477 vty_out(vty, " no bgp default ipv4-unicast\n");
7478
7479 /* BGP default local-preference. */
7480 if (bgp->default_local_pref != BGP_DEFAULT_LOCAL_PREF)
7481 vty_out(vty, " bgp default local-preference %u\n",
7482 bgp->default_local_pref);
7483
7484 /* BGP default show-hostname */
7485 if (!!bgp_flag_check(bgp, BGP_FLAG_SHOW_HOSTNAME)
7486 != DFLT_BGP_SHOW_HOSTNAME)
7487 vty_out(vty, " %sbgp default show-hostname\n",
7488 bgp_flag_check(bgp, BGP_FLAG_SHOW_HOSTNAME)
7489 ? ""
7490 : "no ");
7491
7492 /* BGP default subgroup-pkt-queue-max. */
7493 if (bgp->default_subgroup_pkt_queue_max
7494 != BGP_DEFAULT_SUBGROUP_PKT_QUEUE_MAX)
7495 vty_out(vty, " bgp default subgroup-pkt-queue-max %u\n",
7496 bgp->default_subgroup_pkt_queue_max);
7497
7498 /* BGP client-to-client reflection. */
7499 if (bgp_flag_check(bgp, BGP_FLAG_NO_CLIENT_TO_CLIENT))
7500 vty_out(vty, " no bgp client-to-client reflection\n");
7501
7502 /* BGP cluster ID. */
7503 if (CHECK_FLAG(bgp->config, BGP_CONFIG_CLUSTER_ID))
7504 vty_out(vty, " bgp cluster-id %s\n",
7505 inet_ntoa(bgp->cluster_id));
7506
7507 /* Disable ebgp connected nexthop check */
7508 if (bgp_flag_check(bgp, BGP_FLAG_DISABLE_NH_CONNECTED_CHK))
7509 vty_out(vty,
7510 " bgp disable-ebgp-connected-route-check\n");
7511
7512 /* Confederation identifier*/
7513 if (CHECK_FLAG(bgp->config, BGP_CONFIG_CONFEDERATION))
7514 vty_out(vty, " bgp confederation identifier %i\n",
7515 bgp->confed_id);
7516
7517 /* Confederation peer */
7518 if (bgp->confed_peers_cnt > 0) {
7519 int i;
7520
7521 vty_out(vty, " bgp confederation peers");
7522
7523 for (i = 0; i < bgp->confed_peers_cnt; i++)
7524 vty_out(vty, " %u", bgp->confed_peers[i]);
7525
7526 vty_out(vty, "\n");
7527 }
7528
7529 /* BGP deterministic-med. */
7530 if (!!bgp_flag_check(bgp, BGP_FLAG_DETERMINISTIC_MED)
7531 != DFLT_BGP_DETERMINISTIC_MED)
7532 vty_out(vty, " %sbgp deterministic-med\n",
7533 bgp_flag_check(bgp, BGP_FLAG_DETERMINISTIC_MED)
7534 ? ""
7535 : "no ");
7536
7537 /* BGP update-delay. */
7538 bgp_config_write_update_delay(vty, bgp);
7539
7540 if (bgp->v_maxmed_onstartup
7541 != BGP_MAXMED_ONSTARTUP_UNCONFIGURED) {
7542 vty_out(vty, " bgp max-med on-startup %u",
7543 bgp->v_maxmed_onstartup);
7544 if (bgp->maxmed_onstartup_value
7545 != BGP_MAXMED_VALUE_DEFAULT)
7546 vty_out(vty, " %u",
7547 bgp->maxmed_onstartup_value);
7548 vty_out(vty, "\n");
7549 }
7550 if (bgp->v_maxmed_admin != BGP_MAXMED_ADMIN_UNCONFIGURED) {
7551 vty_out(vty, " bgp max-med administrative");
7552 if (bgp->maxmed_admin_value != BGP_MAXMED_VALUE_DEFAULT)
7553 vty_out(vty, " %u", bgp->maxmed_admin_value);
7554 vty_out(vty, "\n");
7555 }
7556
7557 /* write quanta */
7558 bgp_config_write_wpkt_quanta(vty, bgp);
7559 /* read quanta */
7560 bgp_config_write_rpkt_quanta(vty, bgp);
7561
7562 /* coalesce time */
7563 bgp_config_write_coalesce_time(vty, bgp);
7564
7565 /* BGP graceful-restart. */
7566 if (bgp->stalepath_time != BGP_DEFAULT_STALEPATH_TIME)
7567 vty_out(vty,
7568 " bgp graceful-restart stalepath-time %u\n",
7569 bgp->stalepath_time);
7570 if (bgp->restart_time != BGP_DEFAULT_RESTART_TIME)
7571 vty_out(vty, " bgp graceful-restart restart-time %u\n",
7572 bgp->restart_time);
7573 if (bgp_flag_check(bgp, BGP_FLAG_GRACEFUL_RESTART))
7574 vty_out(vty, " bgp graceful-restart\n");
7575
7576 /* BGP graceful-shutdown */
7577 if (bgp_flag_check(bgp, BGP_FLAG_GRACEFUL_SHUTDOWN))
7578 vty_out(vty, " bgp graceful-shutdown\n");
7579
7580 /* BGP graceful-restart Preserve State F bit. */
7581 if (bgp_flag_check(bgp, BGP_FLAG_GR_PRESERVE_FWD))
7582 vty_out(vty,
7583 " bgp graceful-restart preserve-fw-state\n");
7584
7585 /* BGP bestpath method. */
7586 if (bgp_flag_check(bgp, BGP_FLAG_ASPATH_IGNORE))
7587 vty_out(vty, " bgp bestpath as-path ignore\n");
7588 if (bgp_flag_check(bgp, BGP_FLAG_ASPATH_CONFED))
7589 vty_out(vty, " bgp bestpath as-path confed\n");
7590
7591 if (bgp_flag_check(bgp, BGP_FLAG_ASPATH_MULTIPATH_RELAX)) {
7592 if (bgp_flag_check(bgp,
7593 BGP_FLAG_MULTIPATH_RELAX_AS_SET)) {
7594 vty_out(vty,
7595 " bgp bestpath as-path multipath-relax as-set\n");
7596 } else {
7597 vty_out(vty,
7598 " bgp bestpath as-path multipath-relax\n");
7599 }
7600 }
7601
7602 if (bgp_flag_check(bgp, BGP_FLAG_RR_ALLOW_OUTBOUND_POLICY)) {
7603 vty_out(vty,
7604 " bgp route-reflector allow-outbound-policy\n");
7605 }
7606 if (bgp_flag_check(bgp, BGP_FLAG_COMPARE_ROUTER_ID))
7607 vty_out(vty, " bgp bestpath compare-routerid\n");
7608 if (bgp_flag_check(bgp, BGP_FLAG_MED_CONFED)
7609 || bgp_flag_check(bgp, BGP_FLAG_MED_MISSING_AS_WORST)) {
7610 vty_out(vty, " bgp bestpath med");
7611 if (bgp_flag_check(bgp, BGP_FLAG_MED_CONFED))
7612 vty_out(vty, " confed");
7613 if (bgp_flag_check(bgp, BGP_FLAG_MED_MISSING_AS_WORST))
7614 vty_out(vty, " missing-as-worst");
7615 vty_out(vty, "\n");
7616 }
7617
7618 /* BGP network import check. */
7619 if (!!bgp_flag_check(bgp, BGP_FLAG_IMPORT_CHECK)
7620 != DFLT_BGP_IMPORT_CHECK)
7621 vty_out(vty, " %sbgp network import-check\n",
7622 bgp_flag_check(bgp, BGP_FLAG_IMPORT_CHECK)
7623 ? ""
7624 : "no ");
7625
7626 /* BGP flag dampening. */
7627 if (CHECK_FLAG(bgp->af_flags[AFI_IP][SAFI_UNICAST],
7628 BGP_CONFIG_DAMPENING))
7629 bgp_config_write_damp(vty);
7630
7631 /* BGP timers configuration. */
7632 if (bgp->default_keepalive != BGP_DEFAULT_KEEPALIVE
7633 && bgp->default_holdtime != BGP_DEFAULT_HOLDTIME)
7634 vty_out(vty, " timers bgp %u %u\n",
7635 bgp->default_keepalive, bgp->default_holdtime);
7636
7637 /* peer-group */
7638 for (ALL_LIST_ELEMENTS(bgp->group, node, nnode, group)) {
7639 bgp_config_write_peer_global(vty, bgp, group->conf);
7640 }
7641
7642 /* Normal neighbor configuration. */
7643 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
7644 if (CHECK_FLAG(peer->flags, PEER_FLAG_CONFIG_NODE))
7645 bgp_config_write_peer_global(vty, bgp, peer);
7646 }
7647
7648 /* listen range and limit for dynamic BGP neighbors */
7649 bgp_config_write_listen(vty, bgp);
7650
7651 /*
7652 * BGP default autoshutdown neighbors
7653 *
7654 * This must be placed after any peer and peer-group
7655 * configuration, to avoid setting all peers to shutdown after
7656 * a daemon restart, which is undesired behavior. (see #2286)
7657 */
7658 if (bgp->autoshutdown)
7659 vty_out(vty, " bgp default shutdown\n");
7660
7661 /* No auto-summary */
7662 if (bgp_option_check(BGP_OPT_CONFIG_CISCO))
7663 vty_out(vty, " no auto-summary\n");
7664
7665 /* IPv4 unicast configuration. */
7666 bgp_config_write_family(vty, bgp, AFI_IP, SAFI_UNICAST);
7667
7668 /* IPv4 multicast configuration. */
7669 bgp_config_write_family(vty, bgp, AFI_IP, SAFI_MULTICAST);
7670
7671 /* IPv4 labeled-unicast configuration. */
7672 bgp_config_write_family(vty, bgp, AFI_IP, SAFI_LABELED_UNICAST);
7673
7674 /* IPv4 VPN configuration. */
7675 bgp_config_write_family(vty, bgp, AFI_IP, SAFI_MPLS_VPN);
7676
7677 /* ENCAPv4 configuration. */
7678 bgp_config_write_family(vty, bgp, AFI_IP, SAFI_ENCAP);
7679
7680 /* FLOWSPEC v4 configuration. */
7681 bgp_config_write_family(vty, bgp, AFI_IP, SAFI_FLOWSPEC);
7682
7683 /* IPv6 unicast configuration. */
7684 bgp_config_write_family(vty, bgp, AFI_IP6, SAFI_UNICAST);
7685
7686 /* IPv6 multicast configuration. */
7687 bgp_config_write_family(vty, bgp, AFI_IP6, SAFI_MULTICAST);
7688
7689 /* IPv6 labeled-unicast configuration. */
7690 bgp_config_write_family(vty, bgp, AFI_IP6,
7691 SAFI_LABELED_UNICAST);
7692
7693 /* IPv6 VPN configuration. */
7694 bgp_config_write_family(vty, bgp, AFI_IP6, SAFI_MPLS_VPN);
7695
7696 /* ENCAPv6 configuration. */
7697 bgp_config_write_family(vty, bgp, AFI_IP6, SAFI_ENCAP);
7698
7699 /* FLOWSPEC v6 configuration. */
7700 bgp_config_write_family(vty, bgp, AFI_IP6, SAFI_FLOWSPEC);
7701
7702 /* EVPN configuration. */
7703 bgp_config_write_family(vty, bgp, AFI_L2VPN, SAFI_EVPN);
7704
7705 #if ENABLE_BGP_VNC
7706 bgp_rfapi_cfg_write(vty, bgp);
7707 #endif
7708
7709 vty_out(vty, "!\n");
7710 }
7711 return 0;
7712 }
7713
7714 void bgp_master_init(struct thread_master *master)
7715 {
7716 qobj_init();
7717
7718 memset(&bgp_master, 0, sizeof(struct bgp_master));
7719
7720 bm = &bgp_master;
7721 bm->bgp = list_new();
7722 bm->listen_sockets = list_new();
7723 bm->port = BGP_PORT_DEFAULT;
7724 bm->master = master;
7725 bm->start_time = bgp_clock();
7726 bm->t_rmap_update = NULL;
7727 bm->rmap_update_timer = RMAP_DEFAULT_UPDATE_TIMER;
7728 bm->terminating = false;
7729
7730 bgp_process_queue_init();
7731
7732 /* init the rd id space.
7733 assign 0th index in the bitfield,
7734 so that we start with id 1
7735 */
7736 bf_init(bm->rd_idspace, UINT16_MAX);
7737 bf_assign_zero_index(bm->rd_idspace);
7738
7739 /* Enable multiple instances by default. */
7740 bgp_option_set(BGP_OPT_MULTIPLE_INSTANCE);
7741
7742 /* mpls label dynamic allocation pool */
7743 bgp_lp_init(bm->master, &bm->labelpool);
7744
7745 QOBJ_REG(bm, bgp_master);
7746 }
7747
7748 /*
7749 * Free up connected routes and interfaces for a BGP instance. Invoked upon
7750 * instance delete (non-default only) or BGP exit.
7751 */
7752 static void bgp_if_finish(struct bgp *bgp)
7753 {
7754 struct vrf *vrf = vrf_lookup_by_id(bgp->vrf_id);
7755 struct interface *ifp;
7756
7757 if (bgp->inst_type == BGP_INSTANCE_TYPE_VIEW || !vrf)
7758 return;
7759
7760 FOR_ALL_INTERFACES (vrf, ifp) {
7761 struct listnode *c_node, *c_nnode;
7762 struct connected *c;
7763
7764 for (ALL_LIST_ELEMENTS(ifp->connected, c_node, c_nnode, c))
7765 bgp_connected_delete(bgp, c);
7766 }
7767 }
7768
7769 static void bgp_viewvrf_autocomplete(vector comps, struct cmd_token *token)
7770 {
7771 struct vrf *vrf = NULL;
7772 struct listnode *next;
7773 struct bgp *bgp;
7774
7775 RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name)
7776 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, vrf->name));
7777
7778 for (ALL_LIST_ELEMENTS_RO(bm->bgp, next, bgp)) {
7779 if (bgp->inst_type != BGP_INSTANCE_TYPE_VIEW)
7780 continue;
7781
7782 vector_set(comps, XSTRDUP(MTYPE_COMPLETION, bgp->name));
7783 }
7784 }
7785
7786 static const struct cmd_variable_handler bgp_viewvrf_var_handlers[] = {
7787 {.tokenname = "VIEWVRFNAME", .completions = bgp_viewvrf_autocomplete},
7788 {.completions = NULL},
7789 };
7790
7791 struct frr_pthread *bgp_pth_io;
7792 struct frr_pthread *bgp_pth_ka;
7793
7794 static void bgp_pthreads_init()
7795 {
7796 assert(!bgp_pth_io);
7797 assert(!bgp_pth_ka);
7798
7799 frr_pthread_init();
7800
7801 struct frr_pthread_attr io = {
7802 .start = frr_pthread_attr_default.start,
7803 .stop = frr_pthread_attr_default.stop,
7804 };
7805 struct frr_pthread_attr ka = {
7806 .start = bgp_keepalives_start,
7807 .stop = bgp_keepalives_stop,
7808 };
7809 bgp_pth_io = frr_pthread_new(&io, "BGP I/O thread", "bgpd_io");
7810 bgp_pth_ka = frr_pthread_new(&ka, "BGP Keepalives thread", "bgpd_ka");
7811 }
7812
7813 void bgp_pthreads_run()
7814 {
7815 frr_pthread_run(bgp_pth_io, NULL);
7816 frr_pthread_run(bgp_pth_ka, NULL);
7817
7818 /* Wait until threads are ready. */
7819 frr_pthread_wait_running(bgp_pth_io);
7820 frr_pthread_wait_running(bgp_pth_ka);
7821 }
7822
7823 void bgp_pthreads_finish()
7824 {
7825 frr_pthread_stop_all();
7826 frr_pthread_finish();
7827 }
7828
7829 void bgp_init(unsigned short instance)
7830 {
7831
7832 /* allocates some vital data structures used by peer commands in
7833 * vty_init */
7834
7835 /* pre-init pthreads */
7836 bgp_pthreads_init();
7837
7838 /* Init zebra. */
7839 bgp_zebra_init(bm->master, instance);
7840
7841 #if ENABLE_BGP_VNC
7842 vnc_zebra_init(bm->master);
7843 #endif
7844
7845 /* BGP VTY commands installation. */
7846 bgp_vty_init();
7847
7848 /* BGP inits. */
7849 bgp_attr_init();
7850 bgp_debug_init();
7851 bgp_dump_init();
7852 bgp_route_init();
7853 bgp_route_map_init();
7854 bgp_scan_vty_init();
7855 bgp_mplsvpn_init();
7856 #if ENABLE_BGP_VNC
7857 rfapi_init();
7858 #endif
7859 bgp_ethernetvpn_init();
7860 bgp_flowspec_vty_init();
7861
7862 /* Access list initialize. */
7863 access_list_init();
7864 access_list_add_hook(peer_distribute_update);
7865 access_list_delete_hook(peer_distribute_update);
7866
7867 /* Filter list initialize. */
7868 bgp_filter_init();
7869 as_list_add_hook(peer_aslist_add);
7870 as_list_delete_hook(peer_aslist_del);
7871
7872 /* Prefix list initialize.*/
7873 prefix_list_init();
7874 prefix_list_add_hook(peer_prefix_list_update);
7875 prefix_list_delete_hook(peer_prefix_list_update);
7876
7877 /* Community list initialize. */
7878 bgp_clist = community_list_init();
7879
7880 /* BFD init */
7881 bgp_bfd_init();
7882
7883 cmd_variable_handler_register(bgp_viewvrf_var_handlers);
7884 }
7885
7886 void bgp_terminate(void)
7887 {
7888 struct bgp *bgp;
7889 struct peer *peer;
7890 struct listnode *node, *nnode;
7891 struct listnode *mnode, *mnnode;
7892
7893 QOBJ_UNREG(bm);
7894
7895 /* Close the listener sockets first as this prevents peers from
7896 * attempting
7897 * to reconnect on receiving the peer unconfig message. In the presence
7898 * of a large number of peers this will ensure that no peer is left with
7899 * a dangling connection
7900 */
7901 /* reverse bgp_master_init */
7902 bgp_close();
7903
7904 if (bm->listen_sockets)
7905 list_delete(&bm->listen_sockets);
7906
7907 for (ALL_LIST_ELEMENTS(bm->bgp, mnode, mnnode, bgp))
7908 for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer))
7909 if (peer->status == Established
7910 || peer->status == OpenSent
7911 || peer->status == OpenConfirm)
7912 bgp_notify_send(peer, BGP_NOTIFY_CEASE,
7913 BGP_NOTIFY_CEASE_PEER_UNCONFIG);
7914
7915 if (bm->process_main_queue)
7916 work_queue_free_and_null(&bm->process_main_queue);
7917
7918 if (bm->t_rmap_update)
7919 BGP_TIMER_OFF(bm->t_rmap_update);
7920
7921 bgp_lp_finish();
7922 }
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